ASoC: wcd937x: Update EAR PA CnP FSM sequence

EAR PA short switch is not released after
PA is turned on and off.
Address this hardware issue by updating the
EAR PA CnP FSM while EAR power down sequence.

Change-Id: If4269c30c13572db1b252f223368d444b9250901
Signed-off-by: Soumya Managoli <smanag@codeaurora.org>