OMAP3: MMC needs CONFIG_REGULATOR{,_TWL4030} now in defconfigs

MMC doesn't work after 3fe326511c66ab842ef0a09a1f4c564b1a8beecf unless
CONFIG_REGULATOR, CONFIG_REGULATOR_TWL4030 are present in the .config.
Add those in for all OMAP3 defconfigs.  Tested on BeagleBoard, but this is
presumably needed for anything with MMC and TWL4030.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>