soc: pinctrl-lpi: Enable gpio for swr tx data3 for lito v2

Lito swr has three data lines for tx. Third data line is
on different lpi gpio from other data lines for tx.
Enable corresponding gpio.

Change-Id: I3213897766e3b38d3d04ca85410c8ca674efcfc6
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>