power: smb5-lib: Fix QC charger detecion on cold boot

QC chargers are mis-detected as DCP on cold boot. This is caused by
HVDCP_EN_BIT being flipped on and off in early probe, which
interrupts further QC detection after DCP is discovered by APSD.

Fix it by not enabling it by default.

Change-Id: Id424c8477243b52678f782a7b52dc7d405f75167
Signed-off-by: Harry Yang <harryy@codeaurora.org>