ASoC: wcd9335: reset the SWR_CH_CNT at session teardown

In speaker protection usecase, if SWR_CH is already
set to 2 due to bootup tone playback then the initial
calibration fails. As the WSA register writes will
fail due to gr_sid will not match with dev_num
and temperature read will return negative value.
To address this, when session teardown reset the
soundwire master channel count in tasha driver.

CRs-Fixed: 961023
Change-Id: I80ee0dedac8fa81ce54a0e61c839a97b9b45d36b
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>