add MACHINE_CHIPSET in header files, and add common settings in machine_defs.h

machine/FG_8GT_1SX.c

@@ -1,10 +1,7 @@
 #include "machine_defs.h"
 
 __code const struct machine machine = {
-	.machine_name = MACHINE_MODEL,
-	.isRTL8373 = 1,
-	.min_port = 0,
-	.max_port = 8,
+	MACHINE_COMMON_SETTING,
 	.n_sfp = 1,
 	.log_to_phys_port = {1, 2, 3, 4, 5, 6, 7, 8, 9},
 	.phys_to_log_port = {0, 1, 2, 3, 4, 5, 6, 7, 8},