usb_bam: Allow HSUSB BAM to be enabled on bootup itself

HSUSB BAM is not NDP BAM and it must be enabled early before
starting peripheral controller to avoid switching USB core mode
from legacy to BAM with ongoing data transfers.
Also, there could be a possibility that USB OTG driver puts USB
in LPM after its probe incase USB is not connected and before
USB BAM driver is probed. This may result in unclocked access
while enabling USB BAM. To handle this make sure that USB BAM
is probed only after USB OTG and use pm_runtime APIs before
enabling HSUSB BAM.

CRs-Fixed: 848418
Change-Id: I0a5be01e5361ffa10e72b539930cf5e08497621a
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>