ARM: dts: BCM5301X: Fix DTC warning for NAND node

Remove the unnecessary #address-cells and #size-cells properties on the
nand@0 node to fix the warning below.

Warning (avoid_unnecessary_addr_size): /nand-controller@18028000/nand@0: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>