msm_fb: MHL: Driver changes for Integrated MHL

Power up and GPIO functions have been moved to the driver
MHL HPD event also triggers the HDMI HPD event since 8x30
FLUID device doesn't connect HPD line from 8334 to HPD
line from MSM HDMI. The pull-up resistance in 8334 has
been set to the recommended value so that the interrupts
are sent over to MSM-USB driver.

Change-Id: Ib8bb462c81706ff2dc027535ef766917bb7da39d
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>