msm: ipa3: do not BUG() on GSI breakpoint

GSI hardware might be in breakpoint for debugging purposes.
This change allows debugging by not crashing AP on GSI breakpoint.

Change-Id: Ie4c1826cdf2266a6c881cf21b0826077d4ba25e2
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>