checkpatch: add ability to --fix unnecessary blank lines around braces

There's a --strict test for these blank lines.

Add the ability to automatically remove them with --fix.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

scripts/checkpatch.pl

@@ -4461,12 +4461,18 @@ sub process {
 
 # check for unnecessary blank lines around braces
 		if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
-			CHK("BRACES",
-			    "Blank lines aren't necessary before a close brace '}'\n" . $hereprev);
+			if (CHK("BRACES",
+				"Blank lines aren't necessary before a close brace '}'\n" . $hereprev) &&
+			    $fix && $prevrawline =~ /^\+/) {
+				fix_delete_line($fixlinenr - 1, $prevrawline);
+			}
 		}
 		if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
-			CHK("BRACES",
-			    "Blank lines aren't necessary after an open brace '{'\n" . $hereprev);
+			if (CHK("BRACES",
+				"Blank lines aren't necessary after an open brace '{'\n" . $hereprev) &&
+			    $fix) {
+				fix_delete_line($fixlinenr, $rawline);
+			}
 		}
 
 # no volatiles please