Revert "msm: mdss: Reset panel to apply RGB gamma data"

This reverts commit 3f955203339d110d2feff475b80f6f2db728b048.
Revert "msm: mdss: distinguish between Gamma RGB polarity Positive/Negative"

This reverts commit ff57031c77068891740382a4b5e4aef56cc93b0a.

Change-Id: I7208c6f8c752a2634cfce193592d8935a757f3bd