ASoC: wcd: Add support for analog USBC on sdm845

Use USBC_EN2 pin to swap between mic and gnd
on sdm845 instead of using the tavil gpio US_EURO.
Get pinctrl of EN2 when swap is needed and put the
pinctrl when the audio jack is removed so that other
drivers which need EN2 can take hold of it.

CRs-fixed: 2024655
Change-Id: I7d1397eab840950e985605bc5d0f4b48196b5f51
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>