ARM: 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/arch/arm/mach-renesas/Kconfig.32 b/arch/arm/mach-renesas/Kconfig.32
index 693a5ab..bbc61cc 100644
--- a/arch/arm/mach-renesas/Kconfig.32
+++ b/arch/arm/mach-renesas/Kconfig.32
@@ -1,11 +1,11 @@
 if RCAR_32
 
 config ARCH_RENESAS_BOARD_STRING
-	string "Renesas RCar Gen2 board name"
+	string "Renesas R-Car Gen2 board name"
 	default "Board"
 
 config RCAR_GEN2
-	bool "Renesas RCar Gen2"
+	bool "Renesas R-Car Gen2"
 	select PHY
 	select PHY_RCAR_GEN2
 	select TMU_TIMER