This patch fixed the following checkpatch complaint as using pr_*
instead of printk.

WARNING: printk() should include KERN_ facility level
Signed-off-by: NJungseok Lee <jays.lee@samsung.com>
Reviewed-by: NSungjinn Chung <sungjinn.chung@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>