regulator: qpnp-labibb-regulator: Program LAB_PRECHARGE_CTL unconditionally

Currently, LAB_PRECHARGE_CTL register is programmed if LAB is not
ready to be enabled by IBB. LAB_PRECHARGE_CTL needs to be configured
by the LAB/IBB driver irrespective of its previous setting.

CRs-Fixed: 877370
Change-Id: Idb473ba0b063f010e89b669b79f79349ebfd0d59
Signed-off-by: Ravindranath Thiyagarajan <rthiyaga@codeaurora.org>
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>