[WATCHDOG] wdt_pci.c: remove #ifdef CONFIG_WDT_501_PCI

Change the wdt_pci.c watchdog driver so that the code is the same for
both the PCI-WDT500 as the PCI-WDT501 card. The selection of the card
is now being done via the module parameter: 'type' instead of the
config option CONFIG_WDT_501_PCI.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index e8d45b6..b1ccc04 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1007,24 +1007,16 @@
 	---help---
 	  If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
 
-	  To compile this driver as a module, choose M here: the
-	  module will be called wdt_pci.
-
-config WDT_501_PCI
-	bool "PCI-WDT501 features"
-	depends on WDTPCI
-	help
-	  Saying Y here and creating a character special file /dev/temperature
-	  with major number 10 and minor number 131 ("man mknod") will give
-	  you a thermometer inside your computer: reading from
-	  /dev/temperature yields one byte, the temperature in degrees
-	  Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
-	  installed.
+	  If you have a PCI-WDT501 watchdog board then you can enable the
+	  temperature sensor by setting the type parameter to 501.
 
 	  If you want to enable the Fan Tachometer on the PCI-WDT501, then you
 	  can do this via the tachometer parameter. Only do this if you have a
 	  fan tachometer actually set up.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called wdt_pci.
+
 #
 # USB-based Watchdog Cards
 #