msm: camera: flash: Remove regulator power up/down from early PCR

Regulator is enabled at the time of flash init. Early PCR tries to
enable regulator again which is not correct operation. This change
fixes this error by removing regulator in early PCR operation.

Change-Id: Ice6cd13ab1724d15950458579ab60aedd15103fa
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>