This patch transform mcbsp code to use platform data
from arch/arm/plat-omap/devices.c

It also gets ride of ifdefs on mcbsp.c code.
To do it, a platform data structure was defined.
Signed-off-by: NEduardo Valentin <eduardo.valentin@indt.org.br>
Signed-off-by: NTony Lindgren <tony@atomide.com>