usb: dwc3: qcom: fix gadget-only builds

A recent change added a dependency to the USB host stack and broke
gadget-only builds of the driver.

Fixes: 6895ea55

 ("usb: dwc3: qcom: Configure wakeup interrupts during suspend")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20220804151001.23612-4-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>