[PATCH] watchdog: Make TXX9_WDT select WATCHDOG_CORE

[Axel Lin <axel.lin@gmail.com>]

This is required after converting to watchdog core API.

Fix below build errors:
  LD      .tmp_vmlinux1
drivers/built-in.o: In function `txx9wdt_probe':
txx9wdt.c:(.init.text+0x3530): undefined reference to `watchdog_register_device'
drivers/built-in.o: In function `txx9wdt_remove':
txx9wdt.c:(.exit.text+0x158): undefined reference to `watchdog_unregister_device'
make: *** [.tmp_vmlinux1] Error 1

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
I have this change in my source tree but forgot to add it when
generating the patch converting txx9_wdt to watchdog framework.

 drivers/watchdog/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index f5b1ec6..3709624 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1003,6 +1003,7 @@ config AR7_WDT
 config TXX9_WDT
 	tristate "Toshiba TXx9 Watchdog Timer"
 	depends on CPU_TX39XX || CPU_TX49XX
+	select WATCHDOG_CORE
 	help
 	  Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
 
-- 
1.7.5.4