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The ID register field follows the general convention: 0 means missing, anything over 1 means implemented. The special value of 0b1111 has the semantics of "feature unconditionally enabled" which follows this rule. There is no need to special case the feature and code can be simpler. Change-Id: Iaf90eb1f8abb22a48054b4e564dad669e1703dcb Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>