ARM: dts: BCM5301X: Add DT for Luxul XWR-3150 V1

Luxul XWR-3150 is a wireless router similar to the XWR-3100 except:
1) It has more RAM
2) Its NAND controller in running in BCH8 mode
3) LAN ports LEDs are hardware controlled

Signed-off-by: Dan Haab <dan.haab@luxul.com>
Acked-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>