ASoC: msm: qdsp6v2: add early audio interface support

Add early audio interface support to allow
synchronization between ADSP loading and early
audio playback.

Execute the command
'echo 0 > /sys/kernel/lpass_resource_mgr/check_early_audio'
to check if early audio playback is ongoing.
Output will be "Online" if early audio playback is ongoing.

CRs-fixed: 2126727
Change-Id: I95d07c8f3cd93ded112b551238a973a76fb6b7ed
Signed-off-by: Derek Chen <chenche@codeaurora.org>