imx9: imx93_evk: enable CONFIG_WDT

Without this config, there is boot error: Error binding ulp_wdt driver

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/configs/imx93_11x11_evk_defconfig b/configs/imx93_11x11_evk_defconfig
index 9f376d3..c2709f8 100644
--- a/configs/imx93_11x11_evk_defconfig
+++ b/configs/imx93_11x11_evk_defconfig
@@ -115,5 +115,6 @@
 CONFIG_DM_THERMAL=y
 CONFIG_IMX_TMU=y
 CONFIG_ULP_WATCHDOG=y
+CONFIG_WDT=y
 CONFIG_LZO=y
 CONFIG_BZIP2=y