power: qpnp-charger: update QPNP_CHG_VINMIN_MASK of CHGR_VIN_MIN register

Currently QPNP_CHG_VINMIN_MASK is set to 0x1F instead 0x3F but
CHGR_VIN_MIN register supports 6bits value. So update the
QPNP_CHG_VINMIN_MASK from 0x1F to 0x3F.

CRs-Fixed: 547570
Change-Id: I42d8e7811ace0be5e78302846feff2851d6ded77
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>