OMAPDSS: DSSCOMP: extended platform info query for fbmem type

DSSCOMP query platform ioctl returns the platform specific
configuration, platform_info. The platform_info strcuture
is extended to hold fbmem type information as well.
fbmem type is populated by querying sgx omaplfb
platform config data.

Change-Id: I09727c4654d09e83e66ca174f71a00136518c164
Signed-off-by: Sunita Nadampalli <sunitan@ti.com>
Signed-off-by: Lajos Molnar <lajos@ti.com>
Signed-off-by: Dima Svetlov <svetlov@ti.com>