checkpatch: add --strict test for spaces around arithmetic

Some prefer code to have spaces around arithmetic so instead of:
        a = b*c+d;
suggest
        a = b * c + d;

Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
1 file changed