OMAP4 Panda: Generate a unique usbethaddr

The panda board has a usb nic but the nic has no
rom.  Use the die-id to generate a unique address.
This is derived from an RFC kernel patch by Andy Green
that does the same thing:
	https://patchwork.kernel.org/patch/660541/

	[RFC PATCH 1/2] OMAP2+: add cpu id register to MAC address helper

Signed-off-by: John Rigby <john.rigby@linaro.org>
4 files changed