ASoC: wcd9xxx: reinitialize codec irq after subsystem restart

During subsystem restart, it's possible codec's upstream irq is disabled
if irq handler tried to access codec register when it's inaccessible.
Reinitialize codec irq handler after subsystem restart to be able to
bring codec interrupts back to work again.

CRs-fixed: 520754
Change-Id: Iaa6fa8da25cdf6ed6746754385ad895db8dcea9a
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>