realtek: 6.6: copy patch 307-wdt-update-dependency-for-realtek-otto-wdt

Copy the patch file to 6.6

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>

target/linux/realtek/patches-6.6/307-wdt-update-dependency-for-realtek-otto-wdt.patch

@@ -0,0 +1,32 @@
+From b8fc5eecdc5d33cf261986436597b5482ab856da Mon Sep 17 00:00:00 2001
+From: Sander Vanheule <sander@svanheule.net>
+Date: Sun, 14 Nov 2021 19:45:32 +0100
+Subject: [PATCH] realtek: Backport Realtek Otto WDT driver
+
+Add patch submitted upstream to linux-watchdog and replace the MIPS
+architecture symbols. Requires one extra patch for the DIV_ROUND_*
+macros, which have moved to a different header since 5.10.
+
+Submitted-by: Sander Vanheule <sander@svanheule.net>
+Tested-by: Stijn Segers <foss@volatilesystems.org>
+Tested-by: Paul Fertser <fercerpav@gmail.com>
+Tested-by: Stijn Tintel <stijn@linux-ipv6.be>
+---
+ drivers/watchdog/Kconfig                      | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -956,10 +956,10 @@ config RTD119X_WATCHDOG
+ 
+ config REALTEK_OTTO_WDT
+ 	tristate "Realtek Otto MIPS watchdog support"
+-	depends on MACH_REALTEK_RTL || COMPILE_TEST
++	depends on RTL83XX
+ 	depends on COMMON_CLK
+ 	select WATCHDOG_CORE
+-	default MACH_REALTEK_RTL
++	default RTL83XX
+ 	help
+ 	  Say Y here to include support for the watchdog timer on Realtek
+ 	  RTL838x, RTL839x, RTL930x SoCs. This watchdog has pretimeout