watchdog: octeontx_wdt: Add MIPS Octeon support

This patch adds support for the Marvell Octeon watchdog driver, which
currently only support the ARM64 Octeon TX & TX2 platforms. Since the
IP is pretty similar, it makes sense to extend this driver to also
support the MIPS Octeon SoC.

A follow-up patch will enable this watchdog support on the EBB7304
eval board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Aaron Williams <awilliams@marvell.com>
Cc: Chandrakala Chavva <cchavva@marvell.com>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 6043fe7..c51d3b1 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -213,14 +213,13 @@
 	  It performs full SoC reset.
 
 config WDT_OCTEONTX
-	bool "OcteonTX core watchdog support"
-	depends on WDT && (ARCH_OCTEONTX || ARCH_OCTEONTX2)
+	bool "Octeon core watchdog support"
+	depends on WDT && (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2)
 	default y
 	imply WATCHDOG
 	help
-	  This enables OcteonTX watchdog driver, which can be
-	  found on OcteonTX/TX2 chipsets and inline with driver model.
-	  Only supports watchdog reset.
+	  This enables the Octeon watchdog driver, which can be found on
+	  various Octeon parts such as Octeon II/III and OcteonTX/TX2.
 
 config WDT_OMAP3
 	bool "TI OMAP watchdog timer support"