ASoC: wcd9330: Wait for enough time for HPH PA to settle

After Headphone PAs are disabled, there needs to be 5ms
delay before they re-enable again. Having delay less than
5ms will cause PAs not get enabled thus causing audio mute.

CRs-Fixed: 777384
Change-Id: I9203ce9a79af06121890628d7e3493a77329291e
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>