i2c: renesas: Fix R-Car spelling

The correct spelling is R-Car, including the dash, update the usage.
Kconfig strings and comment changes only, no functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 52067fa..cdae682 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -504,16 +504,16 @@
 	  Add support for the OMAP2+ I2C driver.
 
 config SYS_I2C_RCAR_I2C
-	bool "Renesas RCar I2C driver"
+	bool "Renesas R-Car I2C driver"
 	depends on (RCAR_GEN2 || RCAR_64) && DM_I2C
 	help
-	  Support for Renesas RCar I2C controller.
+	  Support for Renesas R-Car I2C controller.
 
 config SYS_I2C_RCAR_IIC
-	bool "Renesas RCar Gen3 IIC driver"
+	bool "Renesas R-Car Gen3 IIC driver"
 	depends on (RCAR_GEN2 || RCAR_GEN3) && DM_I2C
 	help
-	  Support for Renesas RCar Gen3 IIC controller.
+	  Support for Renesas R-Car Gen3 IIC controller.
 
 config SYS_I2C_ROCKCHIP
 	bool "Rockchip I2C driver"