msm: mdss: reset pixel extension flag if validation fails

While validating the pixel extension values, reset the pixel
extension flag in case of failure. If this flag is not reset,
driver will programm the wrong configuration into hardware
registers in the commit ioctl.

Change-Id: I6fb90ca331f39e704a8aa915a04b6be776bcff55
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>
msm: Revert modem drivers to Google MR2
ARM: dts: hammerhead: Change i2c clock rate to 19.2 MHz

Referenced CAF: https://www.codeaurora.org/cgit/quic/la/kernel/msm/commit/arch/arm/boot/dts/msm8974.dtsi?h=kk_3.5&id=2762366bdeb1d2d3bb43ffb21ad3a0908d51551e
Revert "ARM: dts: msm: Add entry for relocatable pil heaps for 8974"

This reverts commit 13a3a7ed9ca391c02b9ddfed57b8eb77c4ba12d0.

We're still using old fw, so this is a waste of memory. This reclaims 30MB of RAM.
ARM: dts: hammerhead: Remove DSI traffic-mode definition

DSI traffic mode is only relevant for video-mode panels. We use command mode.