x86: coding style fixes to arch/x86/lib/string_32.c

Before:
total: 21 errors, 0 warnings, 237 lines checked

After:
total: 0 errors, 0 warnings, 237 lines checked

paolo@paolo-desktop:~/linux.trees.git$ md5sum /tmp/string_32.o.*
c55d059ef1612b32a8bb2771a72ae0d5  /tmp/string_32.o.after
c55d059ef1612b32a8bb2771a72ae0d5  /tmp/string_32.o.before

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>