ASoC: wcd: Fix pop noise when device switch

Pop is observed during switch from playback in native mode
to voice call and vice-versa. This is resolved by mclk
reset to non-native mode before hph path powers up.

CRs-Fixed: 2117960
Change-Id: Ic554c3b2af24dac3ae94b5a239559e5d11e98271
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>