ARM: radxa-rock: set hostname after devicetree initialization
hostname_init() must be called after the devicetree root node has been
initialized, otherwise the check on board compatible always returns
false.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>