Revert "msm: mdp: Revert MDP Port split changes"

@cyanogen
This reverts commit f5cac71257887b1cc28a49ab93a53eb2a7f6780c.
video: msm: Fix MDP bus bandwidth calculation @cyanogen

Original commit here: https://github.com/CyanogenMod/android_kernel_samsung_jf/commit/4db5144160ea03f7d64fc4c7222bc3b13c2970c7

Change-Id: I672858903e5e05f0797a92c1d196b7dde1310ff7
Don't always enable BLT mode in display driver

Change-Id: Ief3827403886656e8e8c070613dd4bb40ddd8c1f