ARM: use -mcpu=cortex-a7 when targeting MSM8226 CPUs (Cortex-A7 based)

this is done in order to force compliant GCC compiler to generate the new
sdiv/udiv instructions supported by Cortex-A7 architecture

Signed-off-by: Paul Reioux <reioux@gmail.com>
Sound Control 3.2: Initial Port to MSM8226 Socs

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	sound/soc/codecs/wcd9306.c