USB: s3c-hsudc: fix checkpatch error and warning

This patch fixes the checkpatch error and warning listed below:

ERROR: code indent should use tabs where possible
WARNING: please, no spaces at the start of a line
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>