x86_64: cmake: fix debug-kernel-monitor only being available if cdrom generation is enabled

arch/x86_64/QEMU.cmake

@@ -78,16 +78,6 @@ if (LLDB)
 		USES_TERMINAL
 		DEPENDS ${patched_kernel} bsp)
 
-	add_custom_target(debug-kernel-monitor
-		COMMAND
-			${QEMU}
-			-kernel ${patched_kernel}
-			-initrd ${sys_dir}/${bsp_name}
-			${generic_flags}
-			-monitor stdio -s -S
-		USES_TERMINAL
-		DEPENDS ${patched_kernel} bsp)
-
 	if (image_cdrom)
 		message(STATUS "QEMU: Enable CD-ROM debug with LLDB")
 		add_custom_target(debug-cdrom
@@ -132,3 +122,14 @@ elseif (GDB)
 			DEPENDS ${image_cdrom})
 	endif ()
 endif ()
+
+add_custom_target(debug-kernel-monitor
+	COMMAND
+		${QEMU}
+		-kernel ${patched_kernel}
+		-initrd ${sys_dir}/${bsp_name}
+		${generic_flags}
+		-monitor stdio -s -S
+	USES_TERMINAL
+	DEPENDS ${patched_kernel} bsp)
+