staging: sm750: fix whitespace

This patch fixes whitespace checkpatch.pl warnings and errors.
Mainly whitespaces around operators.

- ERROR: spaces required around that ':' (ctx:VxW)
- ERROR: space required after that ';' (ctx:VxV)
- ERROR: spaces required around that '<' (ctx:VxV)
- ERROR: spaces required around that '!=' (ctx:VxV)

And some small warnings around whitespace:

- ERROR: trailing whitespace
- WARNING: space prohibited before semicolon
- WARNING: unnecessary whitespace before a quoted newline

Signed-off-by: Michel von Czettritz <michel.von.czettritz@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>