ASoC: wcd9330: Wait for enough time for Line PAs to get settled

During fast switching of audio playback, we need to wait
for 5ms for the LINE PAs to get settled down before enabling
them again for playback. Same delay is also required after PA
is enabled. Add the required delays after LINE PAs are enabled
or disabled.

CRs-Fixed: 668339
Change-Id: Ic867ca555bb0cf211cd6afa0e78d63e04e525076
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>