usb: usb_bam: Rename "qcom" vendor prefix to "qti"

The vendor prefix "qcom" is being replaced with "qti" to
comply with new naming conventions. Update properties and
compatible strings in the usb_bam  driver as well as
existing device tree bindings.

Change-Id: I983643ed64ab3ff788b9d908f623aa5faa4228e6
Signed-off-by: Lena Salman <esalman@codeaurora.org>