qcom: pil-msa: Correct the failure path for modem bootup

Currently, when modem boot fails after MBA has started running,
the necessary cleanup is not done. Use the deinit_image() pil
op to disable the necessary clocks and regulators while asserting
the halt bits before returning a failure.

Change-Id: I312046ba1d7f551066efcea1cccd753b4595f5eb
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>