ARM: dts: OMAP5: add palmas-usb node

Without this node, there will be no palmas driver to notify
dwc3 that a cable has been connected and, without that, dwc3
will never initialize.

Signed-off-by: Felipe Balbi <balbi@ti.com>
[kishon@ti.com: added dt properties for enabling vbus/id interrupts
and fixed vbus-supply value after SMPS10 is modeled as 2 regulators]
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>