arm64: Provide "model name" in /proc/cpuinfo for PER_LINUX32 tasks

arm64: Provide "model name" in /proc/cpuinfo for PER_LINUX32 tasks

commit e47b020a323d1b2a7b1e9aac86e99eae19463630 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>