checkpatch: Add exception to BRACKED_SPACE rule for macros

When brackets are used in macros, there may sometimes be a space in
front of them. The checkpatch script should allow this.
The change includes the example that triggered the need for this
change.

Signed-off-by: Rubin Gerritsen <[email protected]>

Author: rugeGerritsen

scripts/checkpatch.pl

@@ -4419,11 +4419,13 @@ sub process {
 #  1. with a type on the left -- int [] a;
 #  2. at the beginning of a line for slice initialisers -- [0...10] = 5,
 #  3. inside a curly brace -- = { [0...10] = 5 }
+#  4. inside macro arguments, example: #define HCI_ERR(err) [err] = #err
 		while ($line =~ /(.*?\s)\[/g) {
 			my ($where, $prefix) = ($-[1], $1);
 			if ($prefix !~ /$Type\s+$/ &&
 			    ($where != 0 || $prefix !~ /^.\s+$/) &&
 			    $prefix !~ /[{,:]\s+$/ &&
+			    $prefix !~ /\#define\s+.+\s+$/ &&
 			    $prefix !~ /:\s+$/) {
 				if (ERROR("BRACKET_SPACE",
 					  "space prohibited before open square bracket '['\n" . $herecurr) &&