usb_bam: Fix producer request on resume

In certain scenario, where no consumer request the variable
'pipes_resumed' remain != 0, therefore on next suspend and resume
iteration, the producer request will be skipped.

CRs-Fixed: 548971
Change-Id: Ia2ec567f152153321c538e93899012c59ad28197
Signed-off-by: Lena Salman <esalman@codeaurora.org>
Signed-off-by: Ido Shayevitz <idos@codeaurora.org>