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

There is a spelling mistake in a Kconfig description. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221007203210.2756505-1-colin.i.king@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>