msm: ADSPRPC: Add checks for erroneous values

Check for invalid parameters passed in user invocation
and validate the return values using appropriate macros.

Change-Id: If529873d025ac0c13725efbedda5a58fae327722
Acked-by: Sathish Ambley <sambley@qti.qualcomm.com>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>