regulator: qpnp-labibb: Add support for controlling IBB pulse skip timing

The IBB pulse-skip and NLIMIT DAC configuration should be disabled
before applying the 2nd SWIRE command skip logic, to guarantee
that the IBB voltage changes immediately in the subsequent
SWIRE command. After the WA is completed, the pulse-skip can
be re-enabled after a programmable delay. Add this logic and
a DT property 'qcom,swire-ibb-ps-enable-delay' to configure
this delay. If this delay is not specified in the DT it defaults
to 200ms.

CRs-Fixed: 1010085
Change-Id: Ifec458a0028c16440ffd6ac1f6fa58eebc815c5a
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>