staging: sm750: Reindent

The reindent fixes the
"WARNING: please, no spaces at the start of a line",
"ERROR: code indent should use tabs where possible"
and some other small checkpatch.pl warnings and errors.
Signed-off-by: NMichel von Czettritz <michel.von.czettritz@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>