checkpatch: fix "GLOBAL_INITIALISERS" test

Commit d5e616fc ("checkpatch: add a few more --fix corrections")
broke the GLOBAL_INITIALISERS test with bad parentheses and optional
leading spaces.

Fix it.

Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Bandan Das <bsd@makefile.in>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>