usb: Update PID to 9048 for mdm_bridge, diag_bridge, embedded rmnet drivers

mdm9x15 default composition changed from 0x9001 to 0x9048 to include
new serial interfaces and additional rmnet interfaces. Hence update the
PID for mdm_bridge, diag_bridge, embedded rmnet drivers to support new
composition.

Change-Id: I5c3778ef6b8fddd07d1a0789213e4b289ccc7567
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>