ARM: dts: msm: Update MPM mapping for USB HV interrupts for msm8937

In the current design we are not mapping USB DP and DM lines
to any GIC irqs. This change will update MPM mapping for
DP, DM lines. Async irq is now mapped to DP and core irq
is mapped to DM lines.

Change-Id: I9287b495e4a4615663bbaceb7ec87c98e907d200
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>