usb_bam: Don't configure USB BAM IRQ as wakeup source

Currently usb bam driver is making request to configure USB BAM IRQ
as APPS wakeup source. With this, device won't go into XO shutdown
as there is no MPM pin to handle this request. Hence don't request
SPS driver to configure USB BAM IRQ as wakeup source.

Change-Id: I818c0dd6aa8c6e5c66b1d31d21403b7b53163773
Signed-off-by: Mayank Rana <mrana@codeaurora.org>