armbian: disable Panfrost/Panthor GPU drivers for RK3576

Open-source Panfrost/Panthor drivers allocate 10-bit XR30 framebuffers
which trigger VOP CSC color corruption on the RK3576. Disable them so
the vendor Mali driver is used instead.

Author: mingzhangqun

config/boards/recomputer-rk3576-devkit.conf

@@ -66,6 +66,11 @@ function custom_kernel_config__recomputer_rk3576_customizations() {
 		# fan
 		kernel_config_set_y CONFIG_SENSORS_PWM_FAN
 
+		# GPU — disable open-source Panfrost/Panthor to avoid 10-bit XR30
+		# framebuffer allocation that triggers VOP CSC color corruption
+		kernel_config_set_n CONFIG_DRM_PANFROST
+		kernel_config_set_n CONFIG_DRM_PANTHOR
+
 		# Goodix touchscreen
 		kernel_config_set_y CONFIG_TOUCHSCREEN_GOODIX
 	fi