Fixes:
arch/arm/boards/vexpress/init.c: In function 'vexpress_core_init':
arch/arm/boards/vexpress/init.c:139:22: warning: 'hostname' may be used uninitialized in this function [-Wmaybe-uninitialized]
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>