video: msm: Remove buggy locking around FB operations

 * This code is unnecessary, and causes lockups at suspend if an
   operation is in progress and the mutex is taken. This happens
   frequently with the HDMI code, resulting in a DPM suspend timeout
   followed by a watchdog reset.

This reverts commit 8c189654223cca2d7cc6b9e1715385339917fae2.

Change-Id: I7e8bcdf5e6937240647a53e546e4f8445e86fd91
Merge remote-tracking branch 'cm/cm-10.1' into HEAD
msm8660: disable inlining of spinlocks

  * temporary hack for stability problems
    https://jira.cyanogenmod.org/browse/QSDB-30
  * Random reboots were fixed in CM10 by turning off these defconfigs
    among a few other debug options. We further isolated the improvement
    was due to only the inlining options.  See this commit for reference:

https://github.com/CyanogenMod/android_kernel_samsung_msm8660-common/commit/e70e9da2de08e89c4ba7bd5af69a4bd1eb22d69a

Change-Id: Ia5fe1a7b6c8b036f16a6b8e2577959ce183e1028