msm: cvp: handles dsp error more reliably

In case DSP failed to respond to CPU command correctly, cvp driver
shall ignore the DSP error other than print error message. It shall
keep working normally.

Change-Id: Id33c0063b6326bc45527e2b4d60584045ca1e07c
Signed-off-by: George Shen <sqiao@codeaurora.org>