tuna: remove recovery_keys.c

No longer needed because of changes to default_recovery_keys.c

See http://review.cyanogenmod.org/#/c/62724

Change-Id: I7e43ab5b14e47f4839a5072bedf56e4c9a8fab78
tuna: Add default value for display color control

Change-Id: I9616d66b8992a3abe360b83d10406c6b88e63de0
tuna: cmhw: add support for third-party kernel

Color & Gamma can be adjusted now on non-stock kernels.
Tested on maguro with Fancy, Franco & Mpokang kernel.

Change-Id: I398d29456fa15a67c1f4095eaf246ccea9e9f8d3
Signed-off-by: Lorenzo M <djmesias@yahoo.es>