get_maintainer: Honor mailmap for in file emails

Add support to also use the mailmap for 'in file' email addresses.

Link: https://lkml.kernel.org/r/20220323193645.317514-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Reported-by: Marc Zyngier <maz@kernel.org>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

scripts/get_maintainer.pl

@@ -983,6 +983,7 @@ sub get_maintainers {
 	}
 
 	foreach my $email (@file_emails) {
+	    $email = mailmap_email($email);
 	    my ($name, $address) = parse_email($email);
 
 	    my $tmp_email = format_email($name, $address, $email_usename);