rockchip64: panel-simple-dsi: fix clang -Wincompatible-pointer-types-discards-qualifiers

of_get_drm_display_mode() takes u32 *bus_format, but the patch passed
&p->desc->bus_format where desc is const struct panel_desc *. GCC
tolerates this; clang rejects it under -Werror since the removal of
the blanket -Wno-error=unknown-warning-option from KCFLAGS.

The pointed-to memory is actually writable (desc is allocated via
devm_kmemdup in this driver), so cast the constness away at the call
site. Applied to rockchip64-6.6/6.12/6.18/7.1; the 7.2 copy of the
patch is .disabled and left untouched.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: iav

patch/kernel/archive/rockchip64-6.12/general-add-panel-simple-dsi.patch

@@ -388,7 +388,7 @@ index 000000000000..111111111111
 +	if (!mode)
 +		return 0;
 +
-+	ret = of_get_drm_display_mode(panel->dev->of_node, mode, &p->desc->bus_format,
++	ret = of_get_drm_display_mode(panel->dev->of_node, mode, (u32 *)&p->desc->bus_format,
 +				      OF_USE_NATIVE_MODE);
 +	if (ret) {
 +		dev_dbg(panel->dev, "failed to find dts display timings\n");

patch/kernel/archive/rockchip64-6.18/general-add-panel-simple-dsi.patch

@@ -388,7 +388,7 @@ index 000000000000..111111111111
 +	if (!mode)
 +		return 0;
 +
-+	ret = of_get_drm_display_mode(panel->dev->of_node, mode, &p->desc->bus_format,
++	ret = of_get_drm_display_mode(panel->dev->of_node, mode, (u32 *)&p->desc->bus_format,
 +				      OF_USE_NATIVE_MODE);
 +	if (ret) {
 +		dev_dbg(panel->dev, "failed to find dts display timings\n");

patch/kernel/archive/rockchip64-6.6/general-add-panel-simple-dsi.patch

@@ -388,7 +388,7 @@ index 000000000000..e3c8dcf8cb5e
 +	if (!mode)
 +		return 0;
 +
-+	ret = of_get_drm_display_mode(panel->dev->of_node, mode, &p->desc->bus_format,
++	ret = of_get_drm_display_mode(panel->dev->of_node, mode, (u32 *)&p->desc->bus_format,
 +				      OF_USE_NATIVE_MODE);
 +	if (ret) {
 +		dev_dbg(panel->dev, "failed to find dts display timings\n");

patch/kernel/archive/rockchip64-7.1/general-add-panel-simple-dsi.patch

@@ -389,7 +389,7 @@ index 000000000000..111111111111
 +	if (!mode)
 +		return 0;
 +
-+	ret = of_get_drm_display_mode(panel->dev->of_node, mode, &p->desc->bus_format,
++	ret = of_get_drm_display_mode(panel->dev->of_node, mode, (u32 *)&p->desc->bus_format,
 +				      OF_USE_NATIVE_MODE);
 +	if (ret) {
 +		dev_dbg(panel->dev, "failed to find dts display timings\n");