gpiomux-8974: Add platform based MSM GPIO 81 configuration

MSM GPIO 81 is configured for AUXPCM on CDP platform
and for EPM on all non-CDP based platforms. Configure
the GPIO based on the platform.

Change-Id: I335516f9698a2a711a4d4075699c0b1ed94502b9
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>