bcm963158: enable watchdog and reboot with watchdog

Enable watchdog and reboot with watchdog in the configuration.
Signed-off-by: NPhilippe Reynes <philippe.reynes@softathome.com>

configs/bcm963158_ram_defconfig

@@ -36,5 +36,7 @@ CONFIG_DM_SERIAL=y
 CONFIG_SERIAL_SEARCH_ALL=y
 CONFIG_PL01X_SERIAL=y
 CONFIG_SYSRESET=y
+CONFIG_SYSRESET_WATCHDOG=y
+CONFIG_WDT_BCM6345=y
 CONFIG_REGEX=y
 # CONFIG_GENERATE_SMBIOS_TABLE is not set