Add OMAP_COMPAT and OMAP_ENHANCEMENT frameworks flags

OMAP_ENHANCEMENT is for omapzoom stuff, if required...

OMAP_COMPAT will be required soon to use the specific
wlan and omap3 codecs. (Same as CM7)

PS: We already use omap3-compat as hardware/ti/omap3
    on the defy ics version since months...

Change-Id: I7e9d9abd39b8bf5b62fa5583241eb0fcfffaba01