dsp: adsp-loader: avoid updating APR state after ADSP loading

APR state update should happen only after ADSP up
notification recieved by APSS, and not just after
ADSP is loaded and booted up.
Avoid setting APR state to loaded after PIL loading
of ADSP image is complete.

Change-Id: I9b9f073279c306562e427ec2c7e73dfa7d71f956
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>