mtd: 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/mtd/Kconfig b/drivers/mtd/Kconfig
index 3764e25..e7ce8b9 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -194,11 +194,11 @@
 	  "Embedded Peripherals IP User Guide" of Altera.
 
 config RENESAS_RPC_HF
-	bool "Renesas RCar Gen3 RPC HyperFlash driver"
+	bool "Renesas R-Car Gen3 RPC HyperFlash driver"
 	depends on RCAR_GEN3 && DM_MTD
 	help
 	  This enables access to HyperFlash memory through the Renesas
-	  RCar Gen3 RPC controller.
+	  R-Car Gen3 RPC controller.
 
 config HBMC_AM654
 	bool "HyperBus controller driver for AM65x SoC"
diff --git a/drivers/mtd/renesas_rpc_hf.c b/drivers/mtd/renesas_rpc_hf.c
index 0354582..50a6191 100644
--- a/drivers/mtd/renesas_rpc_hf.c
+++ b/drivers/mtd/renesas_rpc_hf.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Renesas RCar Gen3 RPC HyperFlash driver
+ * Renesas R-Car Gen3 RPC HyperFlash driver
  *
  * Copyright (C) 2016 Renesas Electronics Corporation
  * Copyright (C) 2016 Cogent Embedded, Inc.