[WATCHDOG] mpc83xx_wdt: rename to mpc8xxx_wdt

Rename the driver because now we support some MPC86xx processors.

There are no changes to the mpc83xx_wdt.c file, yet.  When possible, we do
file renames and changes separately (because Linus once asked so, because
it helps git to track the renamed files).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 9332962..01e33e8 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -695,9 +695,16 @@
 	tristate "MPC8xx Watchdog Timer"
 	depends on 8xx
 
-config 83xx_WDT
-	tristate "MPC83xx/MPC86xx Watchdog Timer"
+config 8xxx_WDT
+	tristate "MPC8xxx Platform Watchdog Timer"
 	depends on PPC_83xx || PPC_86xx
+	help
+	  This driver is for a SoC level watchdog that exists on some
+	  Freescale PowerPC processors. So far this driver supports:
+	  - MPC83xx watchdogs
+	  - MPC86xx watchdogs
+
+	  For BookE processors (MPC85xx) use the BOOKE_WDT driver instead.
 
 config MV64X60_WDT
 	tristate "MV64X60 (Marvell Discovery) Watchdog Timer"