usb: usb_bam: Add generic support for host mode

USB BAM driver supports essentially two types of BAM pipes.
One is USB device mode pipe, which is used in USB tethering and
QDSS use cases.
Second is HSIC host mode pipe, which is used in WLAN use case.

Add support for USB host mode pipe, which is needed for ODU use case.
For that, generalize the support for host mode operation, such that it
can support both USB and HSIC.

Change-Id: Id9a6f3f3ae85681beccdabe89ed03a791ecdcfd4
Signed-off-by: Amit Blay <ablay@codeaurora.org>
Signed-off-by: Lena Salman <esalman@codeaurora.org>