msm: ipa: fix BAM register dump stall debug logic

BAM-DMA may not be clocked so avoid dumping its registers.
Also limit the IPA BAM pipes dumped to reduce time spent
in this dump logic.

Change-Id: I1e4f4963f44b3644913e3804f4efdfb361f4eed5
Signed-off-by: Ravi Gummadidala <rgummadi@codeaurora.org>