Define tsec flag values in config files

The tsec_info structure and array has a "flags" field for each
ethernet controller.  This field is the only reason there are
settings.  Switch to defining TSECn_FLAGS for each controller
in the config header, and we can greatly simplify the array, and
also simplify the addition of future boards.

Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/include/configs/sbc8349.h b/include/configs/sbc8349.h
index 1831bef..aa515ea 100644
--- a/include/configs/sbc8349.h
+++ b/include/configs/sbc8349.h
@@ -410,6 +410,8 @@
 #define TSEC2_PHY_ADDR		0x1a
 #define TSEC1_PHYIDX		0
 #define TSEC2_PHYIDX		0
+#define TSEC1_FLAGS		TSEC_GIGABIT
+#define TSEC2_FLAGS		TSEC_GIGABIT
 
 /* Options are: TSEC[0-1] */
 #define CONFIG_ETHPRIME		"TSEC0"