regulator: qpnp-labibb: Add logic to skip second SWIRE command

On newer AMOLED panels the second SWIRE command is expected to
control the AVDD voltage. However, the PMI8950/PMI8994 IBB module
interprets this command for VDISN and incorrectly reduces its voltage.

Add DT properties 'qcom,skip-2nd-swire-cmd' to skip the second
SWIRE command and 'qcom,swire-2nd-cmd-delay' to explicitly specify
the delay between the first and second SWIRE command.

CRs-Fixed: 938038
Change-Id: I617a8490784efd760651b3ec8780cc4fd4b17bae
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>