ASoC: msm: qdsp6v2: Check for null pointers

Add check for null data pointer in
adm_callback() and log error message if
true.

CRs-Fixed: 575222
Change-Id: I88a4d19cc2e78610249e404bce93831557995fab
Signed-off-by: Kenneth Westfield <kwestfie@codeaurora.org>
ASoC: msm: qdsp6v2: Add upper bounds check on index

Add upper bounds check for return value of
q6audio_get_port_index().

CRs-Fixed: 575227
Change-Id: I263fc6d759beffd2c2fecc7794c279939ab25401
Signed-off-by: Kenneth Westfield <kwestfie@codeaurora.org>
ASoC: msm: Add sample rates to PCM front-end

Add two additional sample rates to the PCM front-
end: 88200 KHz and 176400 KHz.

CRs-Fixed: 601715
Change-Id: If61fb034a60f41b5c63a00fd764da50db7333cb5
Signed-off-by: Kenneth Westfield <kwestfie@codeaurora.org>