USB: host: Kconfig: Fix spelling mistake "firwmare" -> "firmware"

There is a spelling mistake in a Kconfig description. Fix it.
Signed-off-by: NColin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221007203210.2756505-1-colin.i.king@gmail.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/Kconfig

@@ -47,7 +47,7 @@ config USB_XHCI_PCI_RENESAS
 	tristate "Support for additional Renesas xHCI controller with firmware"
 	help
 	  Say 'Y' to enable the support for the Renesas xHCI controller with
-	  firmware. Make sure you have the firwmare for the device and
+	  firmware. Make sure you have the firmware for the device and
 	  installed on your system for this device to work.
 	  If unsure, say 'N'.