[PATCH] beaglebone capes: Added overlays for CBB-Serial cape

Added main overaly for CBB-Serial BeagleBone cape, as well as separate
overlays to mux the AM335x UART2 and UART4 RTS and CTS pins to the 3.8
branch.

Signed-off-by: Alexander Hiam <hiamalexander@gmail.com>

Thanks Alexander!

pushed to all 3.8 tree's...

Regards,

Very cool, thanks!