usb: cdns3: core: Fix a couple of incorrectly documented function names

usb: cdns3: core: Fix a couple of incorrectly documented function names

Fixes the following W=1 kernel build warning(s):

 drivers/usb/cdns3/core.c:342: warning: expecting prototype for cdsn3_role_get(). Prototype was for cdns_role_get() instead
 drivers/usb/cdns3/core.c:428: warning: expecting prototype for cdns_probe(). Prototype was for cdns_init() instead

Cc: Peter Chen <peter.chen@kernel.org>
Cc: Pawel Laszczak <pawell@cadence.com>
Cc: Roger Quadros <rogerq@kernel.org>
Cc: Aswath Govindraju <a-govindraju@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210526130037.856068-2-lee.jones@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>