checkpatch: do not report nr_static as a static declaration

Ensure we do not report identifiers containing the word static as static
declarations.  For example this should not be reported as an unecessary
assignement of 0:

	long nr_static = 0;
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/checkpatch.pl

@@ -1632,7 +1632,7 @@ sub process {
 				$herecurr);
 		}
 # check for static initialisers.
-		if ($line =~ /\s*static\s.*=\s*(0|NULL|false)\s*;/) {
+		if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
 			ERROR("do not initialise statics to 0 or NULL\n" .
 				$herecurr);
 		}