soc: qcom: pil-msa: Correct the modem metadata error path

Currently, if MBA authentication of the modem metadata fails,
we do not free the debug policy dma attributes. Fix that.

Change-Id: I989ab4fe44a5a32c99a643ef388fa42392d715da
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>