Latest Lakka Switch Patches (#1600)

* Update kernel Config/patches for CEC support

* Add base CEC support to dock-hotplug, and make so support can be disabled via uenv.txt

* Add working libcec package for L4T, and enable CEC support in packages.

* Fix pulseaudio-alsa routing

This fixes using other audio backends(Alsathread, Alsa, TinyAlsa) in retroarch via dock or bluetooth.

* Downgrade GCC in L4T builds

This fixes issues revolving around undefined symbol: __aarch64_ldadd4_acq_rel issue with gcc 10

* Fix updater for switch builds
Only tested working with tar archives.

* Edit retroarch default settings for the switch.

* Fix pulseaudio changing sink volume issues.

packages/sysutils/busybox/scripts/init

@@ -314,8 +314,9 @@ check_is_compatible() {
 
 update_file() {
   if [ -f "$UPDATE_DIR/$2" -a -f "$3" ]; then
-    mount -o remount,rw /flash
-
+    if [ ! "$NX_BOOT" = "yes" ]; then
+      mount -o remount,rw /flash
+    fi
     rm -f "$3"
     StartProgress percent "Updating $1... " "$3" $(stat -t "$UPDATE_DIR/$2" | awk '{print $2}')
       # use dd here with conv=fsync so that all writes are non-buffered
@@ -326,8 +327,10 @@ update_file() {
       StopProgress
 
     # loopback file needs writable /flash all the time
-    if [ "${disk%%=*}" != "FILE" ]; then
-      mount -o remount,ro /flash
+    if [ ! "$NX_BOOT" = "yes" ]; then
+      if [ "${disk%%=*}" != "FILE" ]; then
+        mount -o remount,ro /flash
+      fi
     fi
     sync
   fi
@@ -587,7 +590,7 @@ mount_storage() {
 
   wakeonlan
 
-  if [  "$NX_BOOT" = "yes" ]; then
+  if [ "$NX_BOOT" = "yes" ]; then
     DISTRO=${IMAGE_SYSTEM%'/'*}
     mkdir -p /flash/$DISTRO/storage
     mount --bind /flash/$DISTRO/storage /storage
@@ -744,7 +747,12 @@ check_update() {
       tar -xf "$UPDATE_TAR" -C $UPDATE_DIR/.tmp 1>/dev/null 2>/tmp/tarresult.txt || TARRESULT="1"
 
     if [ "${TARRESULT}" -eq "0" ]; then
-      mv $UPDATE_DIR/.tmp/*/target/* $UPDATE_DIR &>/dev/null
+      if [ "$NX_BOOT" = "yes" ]; then
+        mv $UPDATE_DIR/.tmp/* $UPDATE_DIR &>/dev/null
+        UPDATE_DIR=${UPDATE_TAR%.*}
+      else
+        mv $UPDATE_DIR/.tmp/*/target/* $UPDATE_DIR &>/dev/null
+      fi
       sync
       StopProgress "done"
     else
@@ -826,12 +834,25 @@ check_update() {
   fi
 
   sync
+  if [ ! "$NX_BOOT" = "yes" ]; then
+    if [ ! -b "/$IMAGE_KERNEL" -a ! -f "/flash/$IMAGE_KERNEL" ] || [ ! -f "/flash/$IMAGE_SYSTEM" ]; then
+      echo "Missing (target) ${IMAGE_KERNEL} or ${IMAGE_SYSTEM}!"
+      do_cleanup
+      StartProgress countdown "Normal startup in 30s... " 30 "NOW"
+      return 0
+    fi
+  else
+    if [ ! -f "/flash/$IMAGE_KERNEL" ] || [ ! -f "/flash/$IMAGE_SYSTEM" ]; then
+      echo "Missing (target) ${IMAGE_KERNEL} or ${IMAGE_SYSTEM}!"
+      do_cleanup
+      StartProgress countdown "Normal startup in 30s... " 30 "NOW"
+      return 0
+    fi
+  fi
 
-  if [ ! -b "/$IMAGE_KERNEL" -a ! -f "/flash/$IMAGE_KERNEL" ] || [ ! -f "/flash/$IMAGE_SYSTEM" ]; then
-    echo "Missing (target) ${IMAGE_KERNEL} or ${IMAGE_SYSTEM}!"
-    do_cleanup
-    StartProgress countdown "Normal startup in 30s... " 30 "NOW"
-    return 0
+  if [ "$NX_BOOT" = "yes" ]; then
+    UPDATE_KERNEL=$IMAGE_KERNEL
+    UPDATE_SYSTEM=$IMAGE_SYSTEM
   fi
 
   if [ ! -f "$UPDATE_DIR/$UPDATE_KERNEL" -o ! -f "$UPDATE_DIR/$UPDATE_SYSTEM" ]; then
@@ -842,7 +863,7 @@ check_update() {
   fi
 
   # check md5 sums if .nocheck doesn't exist
-  if [ ! -f "$UPDATE_ROOT/.nocheck" ]; then
+  if [ ! -f "$UPDATE_ROOT/.nocheck" -a ! "$NX_BOOT" = "yes" ]; then
     if [ -f "$UPDATE_DIR/${UPDATE_KERNEL}.md5" -a -f "$UPDATE_DIR/${UPDATE_SYSTEM}.md5" ]; then
       # *.md5 size-check
       if [ ! -s "$UPDATE_DIR/${UPDATE_KERNEL}.md5" -o ! -s "$UPDATE_DIR/${UPDATE_SYSTEM}.md5" ]; then
@@ -988,7 +1009,7 @@ for arg in $(cat /proc/cmdline); do
     SYSTEM_IMAGE=*)
       IMAGE_SYSTEM="${arg#*=}"
       [ "${IMAGE_SYSTEM:0:1}" = "/" ] && IMAGE_SYSTEM="${IMAGE_SYSTEM:1}"
-      ;;
+     ;;
     boot=*)
       boot="${arg#*=}"
       case $boot in