compilation: armbian-kernel: Do not make built-in drivers modules

The current script can overwrite drivers which are set as built-in in
the board-specific config. This is not desirable.

Add a check to ensure we do not convert built-in stuff into modules.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>

Author: Ayush1325

lib/functions/compilation/armbian-kernel.sh

@@ -367,8 +367,14 @@ function armbian_kernel_config__restore_enable_gpio_sysfs() {
 #
 function kernel_config_set_m() {
 	declare module="$1"
-	display_alert "Enabling kernel module" "${module}=m" "debug"
-	run_host_command_logged ./scripts/config --module "$module"
+	state=$(./scripts/config --state "$module")
+
+	if [ "$state" == "y" ]; then
+		display_alert "${module} is already enabled as built-in"
+	else
+		display_alert "Enabling kernel module" "${module}=m" "debug"
+		run_host_command_logged ./scripts/config --module "$module"
+	fi
 }
 
 function kernel_config_set_y() {