regulator: qpnp-labibb: Rename properties to reflect the vendor

Currently, some properties in LABIBB regulator driver are having
prefix "qpnp" which is not reflecting the vendor. Change it to
"qcom" to reflect the vendor name correctly and also match with
other DT properties.

CRs-Fixed: 1071971
Change-Id: I182dddc29f3d7c7b449b56ac7fb84e74061cf3a4
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>