Add missing serial_link.h include

Which fixes a warning when building Ergodox Infinity as a righthand
master.

diff --git a/keyboards/ergodox/infinity/matrix.c b/keyboards/ergodox/infinity/matrix.c
index 1fda904849aa7c97e3d05ecc651d0bdea9760b8d..3364f8c905d7314c67184dab3c5180c736558875 100644 (file)
--- a/keyboards/ergodox/infinity/matrix.c
+++ b/keyboards/ergodox/infinity/matrix.c
@@ -24,6 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "print.h"
 #include "debug.h"
 #include "matrix.h"
+#include "serial_link/system/serial_link.h"
 
 
 /*