mmc: use proper name for the R-Car SoC

It is 'R-Car', not 'RCar'. No code or binding changes, only descriptive text.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index a1520d8..c83c16b 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -66,7 +66,7 @@
  */
 #define TMIO_MMC_SDIO_IRQ		(1 << 2)
 
-/* Some features are only available or tested on RCar Gen2 or later */
+/* Some features are only available or tested on R-Car Gen2 or later */
 #define TMIO_MMC_MIN_RCAR2		(1 << 3)
 
 /*