board: samsung: add missing line breaks for pr_err()
    
    After the commit 9b643e312d52 ("treewide: replace with error() with
    pr_err()"), there are some pr_err() with no line break. Add missing
    line breaks.
    
    Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
    Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>