imx: engicam-imx8mm: drop unused macro

Drop unused WDOG macro

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
diff --git a/board/engicam/imx8mm/spl.c b/board/engicam/imx8mm/spl.c
index f75f2dc..1846134 100644
--- a/board/engicam/imx8mm/spl.c
+++ b/board/engicam/imx8mm/spl.c
@@ -54,8 +54,6 @@
 }
 #endif
 
-#define WDOG_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)
-
 int board_early_init_f(void)
 {
        return 0;