usb: 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>

drivers/usb/gadget/Kconfig

@@ -115,10 +115,10 @@ config USB_GADGET_DWC2_OTG
 	  USB_GADGET to be enabled.
 
 config USB_RENESAS_USBHS
-	bool "Renesas RCar USB2.0 HS controller (gadget mode)"
+	bool "Renesas R-Car USB2.0 HS controller (gadget mode)"
 	select USB_GADGET_DUALSPEED
 	help
-	  The Renesas Rcar USB 2.0 high-speed gadget controller
+	  The Renesas R-Car USB 2.0 high-speed gadget controller
 	  integrated into Salvator and Kingfisher boards. Select this
 	  option if you want the driver to operate in Peripheral mode.
 	  This option requires USB_GADGET to be enabled.

drivers/usb/host/Kconfig

@@ -103,12 +103,12 @@ config USB_XHCI_PCI
 	  Enables support for the PCI-based xHCI controller.
 
 config USB_XHCI_RCAR
-	bool "Renesas RCar USB 3.0 support"
+	bool "Renesas R-Car USB 3.0 support"
 	default y
 	depends on ARCH_RENESAS
 	help
 	  Choose this option to add support for USB 3.0 driver on Renesas
-	  RCar Gen3 SoCs.
+	  R-Car Gen3 SoCs.
 
 config USB_XHCI_STI
 	bool "Support for STMicroelectronics STiH407 family on-chip xHCI USB controller"

drivers/usb/host/xhci-rcar-r8a779x_usb3_v3.h

@@ -1,5 +1,5 @@
 /*
- * Renesas RCar xHCI controller firmware version 3
+ * Renesas R-Car xHCI controller firmware version 3
  *
  * Copyright (c) 2014, Renesas Electronics Corporation
  * All rights reserved.

drivers/usb/host/xhci-rcar.c

@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
  *
- * Renesas RCar USB HOST xHCI Controller
+ * Renesas R-Car USB HOST xHCI Controller
  */
 
 #include <clk.h>