asoc: wcd937x: reset analog and digital path clk ctrl reg only when no active ADC

reset analog and digital path clk ctrl registers,also analog Tx path
configuration only when no active ADC.

Otherwise mute observed for Tx path when these common registers are reset
as part of powering down of any ADC, which is still needed by other
active ADC.

Change-Id: Ic8bc4c2c150205daa4973d800b5b2a7b67c4c6da
Signed-off-by: Shalini Manjunatha <quic_c_shalma@quicinc.com>