Make omapfb_main.c compile again and remove warnings:

    CC      drivers/video/omap/omapfb_main.o
drivers/video/omap/omapfb_main.c: In function omapfb_suspend'
drivers/video/omap/omapfb_main.c: At top level:
drivers/video/omap/omapfb_main.c:1645: warning: initialization from
incompatible pointer type
drivers/video/omap/omapfb_main.c:1646: warning: initialization from
incompatible pointer type
drivers/video/omap/omapfb_main.c:1702: warning: initialization from
incompatible pointer type
drivers/video/omap/omapfb_main.c:1704: warning: initialization from
incompatible pointer type
drivers/video/omap/omapfb_main.c:1704: warning: initialization from
incompatible pointer type
drivers/video/omap/omapfb_main.c:1705: warning: initialization from
incompatible pointer type
drivers/video/omap/omapfb_main.c:1728: warning: initialization from
incompatible pointer type

Signed-off-by: Dirk Behme <dirk.behme_at_de.bosch.com>