core: combo: arm: use appropriate mcpu flags for cortex-a7

Change-Id: If00577d36257e4d03f63f36b159bb2e015958d6a
Signed-off-by: Dima Zavin <dima@android.com>
Signed-off-by: anerik <anerikgames@gmail.com>

Conflicts:
	core/combo/arch/arm/armv7-a-neon.mk