usb: dwc3-meson-g12a: constify drvdata structs

Constify the drvdata structs. This also matches the definition of
member drvdata in dwc3_meson_g12a.

Reviewed-by: Neil Armstrong <[e-mail]>
Signed-off-by: Heiner Kallweit <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/dwc3/dwc3-meson-g12a.c

···
  * reset to recover usage of the port.
  */
 
-static struct dwc3_meson_g12a_drvdata gxl_drvdata = {
+static const struct dwc3_meson_g12a_drvdata gxl_drvdata = {
 	.otg_switch_supported = true,
 	.otg_phy_host_port_disable = true,
 	.clks = meson_gxl_clocks,
···
 	.usb_post_init = dwc3_meson_gxl_usb_post_init,
 };
 
-static struct dwc3_meson_g12a_drvdata gxm_drvdata = {
+static const struct dwc3_meson_g12a_drvdata gxm_drvdata = {
 	.otg_switch_supported = true,
 	.otg_phy_host_port_disable = true,
 	.clks = meson_gxl_clocks,
···
 	.usb_post_init = dwc3_meson_gxl_usb_post_init,
 };
 
-static struct dwc3_meson_g12a_drvdata axg_drvdata = {
+static const struct dwc3_meson_g12a_drvdata axg_drvdata = {
 	.otg_switch_supported = true,
 	.clks = meson_gxl_clocks,
 	.num_clks = ARRAY_SIZE(meson_gxl_clocks),
···
 	.usb_post_init = dwc3_meson_gxl_usb_post_init,
 };
 
-static struct dwc3_meson_g12a_drvdata g12a_drvdata = {
+static const struct dwc3_meson_g12a_drvdata g12a_drvdata = {
 	.otg_switch_supported = true,
 	.clks = meson_g12a_clocks,
 	.num_clks = ARRAY_SIZE(meson_g12a_clocks),
···
 	.usb_init = dwc3_meson_g12a_usb_init,
 };
 
-static struct dwc3_meson_g12a_drvdata a1_drvdata = {
+static const struct dwc3_meson_g12a_drvdata a1_drvdata = {
 	.otg_switch_supported = false,
 	.clks = meson_a1_clocks,
 	.num_clks = ARRAY_SIZE(meson_a1_clocks),