kbuild: fix option processing for -I in headerdep

-I takes an argument.  Without this change only a 1 is added to
@opt_include which is not helpful.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

diff --git a/scripts/headerdep.pl b/scripts/headerdep.pl
index 97399da..b7f6c56 100755 (executable)
--- a/scripts/headerdep.pl
+++ b/scripts/headerdep.pl
@@ -19,7 +19,7 @@ my $opt_graph;
        version => \&version,
 
        all     => \$opt_all,
-       I       => \@opt_include,
+       "I=s"   => \@opt_include,
        graph   => \$opt_graph,
 );