rtc: Kconfig: Fix typo in help message of rx 6110

The help message in the Kconfig for the RX-6110 erronously stated
RX-6610.
Signed-off-by: Claudius Heine <ch@denx.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201117121817.953924-2-ch@denx.de

drivers/rtc/Kconfig

@@ -821,7 +821,7 @@ config RTC_DRV_RX6110
 	tristate "Epson RX-6110"
 	select REGMAP_SPI
 	help
-	  If you say yes here you will get support for the Epson RX-6610.
+	  If you say yes here you will get support for the Epson RX-6110.
 
 	  This driver can also be built as a module. If so the module
 	  will be called rtc-rx6110.