usb: dwc3: meson-gxl: drop usb-gx.h and make dwc3_meson_gxl_force_mode static

Drop this useless usb-gx.h and now make dwc3_meson_gxl_force_mode
static since only used in the dwc3-meson-gxl.c file.

Reviewed-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20240620-u-boot-usb-gxl-phy-set-mode-v2-4-b81c027bc02c@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2 files changed