ASoC: msm8x10-wcd: Defer codec registration until adsp is loaded

Audio codec consists of digital core and analog core while the digital
core is on LPASS. So the codec registration has to wait until adsp is
loaded then the clock and AHB bus are ready for codec. Update the codec
initialization sequence accordingly to accommodate the change as well.

Change-Id: I0dc61dbaf1f0c9db1a3112b1af9a2abaa132111b
Signed-off-by: Kuirong Wang <kuirongw@codeaurora.org>