arm: octeontx: enable WDT_SBSA

The OcteonTX uses ARM's SBSA Watchdog device

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/octeontx_81xx_defconfig b/configs/octeontx_81xx_defconfig
index 9881c10..bcf03db 100644
--- a/configs/octeontx_81xx_defconfig
+++ b/configs/octeontx_81xx_defconfig
@@ -132,4 +132,5 @@
 CONFIG_USB_ETHER_ASIX88179=y
 CONFIG_USB_ETHER_RTL8152=y
 CONFIG_WDT=y
+CONFIG_WDT_SBSA=y
 CONFIG_ERRNO_STR=y