commit e47b020a upstream.

This patch brings the PER_LINUX32 /proc/cpuinfo format more in line with
the 32-bit ARM one by providing an additional line:

model name      : ARMv8 Processor rev X (v8l)
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
[bwh: Backported to 3.16:
 - Adjust filename, context
 - Open-code MIDR_REVISION()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>