phy: renesas: Fix R-Car spelling

The correct spelling is R-Car, including the dash, update the usage.
Comment changes only, no functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

drivers/phy/phy-rcar-gen2.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Renesas RCar Gen2 USB PHY driver
+ * Renesas R-Car Gen2 USB PHY driver
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

drivers/phy/phy-rcar-gen3.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Renesas RCar Gen3 USB PHY driver
+ * Renesas R-Car Gen3 USB PHY driver
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */