ARM: kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS for CPUv6+ && MMU
Modern ARM CPUs can perform efficient unaligned memory accesses in
hardware and this feature is relied up on by code such as the dcache
word-at-a-time name hashing.

[pawitp: adapt to kernel 3.0]

Signed-off-by: Will Deacon <will.deacon@arm.com>
stweaks: actions: Enable Memory Resource Controller Swap Extension when using swap to zram