omap3_beagle: use omap3-beagle-xm-ab.dtb for the xM AB revision

As of v3.15-rc3, omap3-beagle-xm-ab.dtb now exists with the usb hub (ehci) enabled.

For older kernels versions, cherry pick from mainline:
ef78f3869c37c480f1d58462a760a40dabc823f4

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
CC: Tom Rini <trini@ti.com>
CC: Nishanth Menon <nm@ti.com>
1 file changed