scripts: get_abi.pl: Better handle multiple What parameters

Using a comma here is problematic, as some What: expressions
may already contain a comma. So, use \xac character instead.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/e83e7ffaf3429f8dfca00d1d01653ecfa36f6119.1631957565.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

scripts/get_abi.pl

@@ -129,12 +129,12 @@ sub parse_abi {
 				push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1);
 
 				if ($tag =~ m/what/) {
-					$what .= ", " . $content;
+					$what .= "\xac" . $content;
 				} else {
 					if ($what) {
 						parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
 
-						foreach my $w(split /, /, $what) {
+						foreach my $w(split /\xac/, $what) {
 							$symbols{$w}->{xref} = $what;
 						};
 					}
@@ -239,7 +239,7 @@ sub parse_abi {
 	if ($what) {
 		parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
 
-		foreach my $w(split /, /,$what) {
+		foreach my $w(split /\xac/,$what) {
 			$symbols{$w}->{xref} = $what;
 		};
 	}
@@ -328,7 +328,7 @@ sub output_rest {
 
 			printf ".. _%s:\n\n", $data{$what}->{label};
 
-			my @names = split /, /,$w;
+			my @names = split /\xac/,$w;
 			my $len = 0;
 
 			foreach my $name (@names) {