ASoC: wcd-mbhc: Remove hardcoding of hphl and gnd swh to NC for analog USBC

Read hphl_swh and gnd_swh from dtsi instead of hardcoding to NC
for every USBC target. This is done as trinket USBC uses NO switch.

Change-Id: I3dca6c7450579e8feb5d80c1340495958683a026
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>