drivers: msm: Remove all unused local variables

When kernel is compiled with clang -Wunused-variable warning
are getting disabled. To match with GCC settings and enable
-Wunused-variable warnings, removing all ununsed local variables.

Change-Id: Ie588eb9d858fa71093d682d2a9a56467e073f9ae
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>