desolve machine_init.c similar to what we did for machine.c

machine/PCB_SWTG024AS_A_2_0_1_init.c

@@ -0,0 +1,9 @@
+#include "machine_init_defs.h"
+
+void machine_custom_init(void) __banked
+{
+	reg_bit_set(RTL837X_REG_LED_GLB_IO_EN, 6);
+	reg_bit_set(RTL837X_REG_LED_MODE, 17);
+	reg_bit_clear(RTL837X_REG_LED_MODE, 9);
+	reg_bit_clear(RTL837X_REG_LED_MODE, 7);
+}