s3c2410fb: code cleanup

This patch cleans up the driver a bit. It contains
coding style fixes (pointed by Lindent and checkpatch),
white space clean ups and few minor code improvements.
Signed-off-by: NKrzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: NAntonino Daplas <adaplas@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>