linux-imx

ARM: dts: BCM5301X: Describe Northstar pins mux controller

This describes hardware & will allow referencing pin functions. The
first usage is UART1 which allows supporting devices using it.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>