stm32mp1: ram: reload watchdog during ddr test

Avoid watchdog during infinite DDR test.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/ram/stm32mp1/stm32mp1_tests.c b/drivers/ram/stm32mp1/stm32mp1_tests.c
index 7356802..f947b5d 100644
--- a/drivers/ram/stm32mp1/stm32mp1_tests.c
+++ b/drivers/ram/stm32mp1/stm32mp1_tests.c
@@ -4,6 +4,7 @@
  */
 #include <common.h>
 #include <console.h>
+#include <watchdog.h>
 #include <asm/io.h>
 #include <linux/log2.h>
 #include "stm32mp1_tests.h"
@@ -154,6 +155,8 @@
 		return 1;
 	}
 	printf("loop #%d\n", *loop);
+	WATCHDOG_RESET();
+
 	return 0;
 }