usb: dwc2: gadget: Repair 'dwc2_hsotg_core_init_disconnected()'s documentation

usb: dwc2: gadget: Repair 'dwc2_hsotg_core_init_disconnected()'s documentation

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

 drivers/usb/dwc2/gadget.c:3349: warning: expecting prototype for dwc2_hsotg_core_init(). Prototype was for dwc2_hsotg_core_init_disconnected() instead

Cc: Minas Harutyunyan <hminas@synopsys.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: linux-usb@vger.kernel.org
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210526130037.856068-16-lee.jones@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>