watchdog: fix hpwdt Kconfig regression in 3.0-rc

Remove Kconfig regression caused by commit a4616153deae053b29a2b7dd9ec4b2a225accfc5 "watchdog: hpwdt: build hpwdt as module by default with NMI_DECODING enabled"

With the above change applied, hpwdt will be enabled unconditionally by just entering the Watchdog subscreen in menuconfig. Since this driver is not essential to boot any box it should remain disabled until it gets manually enabled, just like all other drivers.

---
 drivers/watchdog/Kconfig |    1 -
 1 file changed, 1 deletion(-)

Index: linux-3.0-rc7/drivers/watchdog/Kconfig
===================================================================
@@ -600,7 +600,6 @@ config IT87_WDT
 config HP_WATCHDOG
 	tristate "HP ProLiant iLO2+ Hardware Watchdog Timer"
 	depends on X86
-	default m
 	help
 	  A software monitoring watchdog and NMI sourcing driver. This driver
 	  will detect lockups and provide a stack trace. This is a driver that