watchdog: remove coh901 driver

The ST-Ericsson U300 platform is getting removed, so this driver is no
longer needed.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210120162745.61268-6-arnd@kernel.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/stericsson-coh901327.txt

-ST-Ericsson COH 901 327 Watchdog timer
-
-Required properties:
-- compatible: must be "stericsson,coh901327".
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- interrupts: the interrupt used for the watchdog timeout warning.
-
-Optional properties:
-- timeout-sec: contains the watchdog timeout in seconds.
-
-Example:
-
-watchdog: watchdog@c0012000 {
-	compatible = "stericsson,coh901327";
-	reg = <0xc0012000 0x1000>;
-	interrupts = <3>;
-	timeout-sec = <60>;
-};

drivers/watchdog/Kconfig

@@ -619,17 +619,6 @@ config SUNXI_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called sunxi_wdt.
 
-config COH901327_WATCHDOG
-	bool "ST-Ericsson COH 901 327 watchdog"
-	depends on ARCH_U300 || (ARM && COMMON_CLK && COMPILE_TEST)
-	default y if MACH_U300
-	select WATCHDOG_CORE
-	help
-	  Say Y here to include Watchdog timer support for the
-	  watchdog embedded into the ST-Ericsson U300 series platforms.
-	  This watchdog is used to reset the system and thus cannot be
-	  compiled as a module.
-
 config NPCM7XX_WATCHDOG
 	tristate "Nuvoton NPCM750 watchdog"
 	depends on ARCH_NPCM || COMPILE_TEST

drivers/watchdog/Makefile

@@ -61,7 +61,6 @@ obj-$(CONFIG_K3_RTI_WATCHDOG) += rti_wdt.o
 obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o
 obj-$(CONFIG_SUNXI_WATCHDOG) += sunxi_wdt.o
 obj-$(CONFIG_RN5T618_WATCHDOG) += rn5t618_wdt.o
-obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o
 obj-$(CONFIG_NPCM7XX_WATCHDOG) += npcm_wdt.o
 obj-$(CONFIG_STMP3XXX_RTC_WATCHDOG) += stmp3xxx_rtc_wdt.o
 obj-$(CONFIG_TS4800_WATCHDOG) += ts4800_wdt.o