usb: usb_bam: Update USB IPA consumer pipe index

Currently USB IPA consumer pipe and producer pipe index are updated
after getting only producer IPA index from IPA port mapping which
leaves consumer IPA index set as zero. Hence USB IPA DL communcation
doesn't work due to mismatch of this pipe index. Hence update USB IPA
consumer index once inquring the same from IPA driver.

Change-Id: I9fe63f476cd6c8f148345a0e08dedc449814ed4a
Signed-off-by: Mayank Rana <mrana@codeaurora.org>