msm: mpq8064: Correct VCAP shutdown procedure

VCAP hardware shutdown sequence was incorrect. This would cause
the hardware to become unstable, which would result in the system
crashing. This patch corrects it so the driver calls the correct
shutdown procedure.

Change-Id: I78273f2c70d9eab060dcc34aef0b3704ed685f40
Signed-off-by: Terence Hampson <thampson@codeaurora.org>