msm: vidc: Declare rotation as an integer

The variable, rotation, is declared as a boolean and
then compared against a constant value. This causes a
kernel warning in a GCC environment. This patch declares
the variable, rotation, as an integer to address the warning.

Change-Id: Ie877ac2279e3a70a99aec1281dea4421fa435329
Signed-off-by: Anant Goel <anantg@codeaurora.org>