rtc: remove bfin driver

The blackfin architecture is getting removed, so this one is
now obsolete.
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Aaron Wu <aaron.wu@analog.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/rtc/Kconfig

@@ -1434,16 +1434,6 @@ config RTC_DRV_AU1XXX
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-au1xxx.
 
-config RTC_DRV_BFIN
-	tristate "Blackfin On-Chip RTC"
-	depends on BLACKFIN && !BF561
-	help
-	  If you say yes here you will get support for the
-	  Blackfin On-Chip Real Time Clock.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called rtc-bfin.
-
 config RTC_DRV_RS5C313
 	tristate "Ricoh RS5C313"
 	depends on SH_LANDISK

drivers/rtc/Makefile

@@ -36,7 +36,6 @@ obj-$(CONFIG_RTC_DRV_ASM9260)	+= rtc-asm9260.o
 obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
 obj-$(CONFIG_RTC_DRV_AT91SAM9)	+= rtc-at91sam9.o
 obj-$(CONFIG_RTC_DRV_AU1XXX)	+= rtc-au1xxx.o
-obj-$(CONFIG_RTC_DRV_BFIN)	+= rtc-bfin.o
 obj-$(CONFIG_RTC_DRV_BRCMSTB)	+= rtc-brcmstb-waketimer.o
 obj-$(CONFIG_RTC_DRV_BQ32K)	+= rtc-bq32k.o
 obj-$(CONFIG_RTC_DRV_BQ4802)	+= rtc-bq4802.o