Make pixis_set_sgmii more general to support MPC85xx boards.

The pixis sgmii command depend on the FPGA support on the board, some 85xx
boards support SGMII riser card but did not support this command, define
CONFIG_PIXIS_SGMII_CMD for those boards which support the sgmii command.

Not like 8544, 8572 has 4 eTsec so that the other two's pixis bits
are not supported by 8544. Therefor, define PIXIS_VSPEED2_MASK and
PIXIS_VCFGEN1_MASK in header file for both boards.

Signed-off-by: Liu Yu <yu.liu@freescale.com>
diff --git a/include/configs/MPC8544DS.h b/include/configs/MPC8544DS.h
index 6b7558b..0987448 100644
--- a/include/configs/MPC8544DS.h
+++ b/include/configs/MPC8544DS.h
@@ -202,6 +202,8 @@
 #define PIXIS_VSPEED2_TSEC3SER	0x1
 #define PIXIS_VCFGEN1_TSEC1SER	0x20
 #define PIXIS_VCFGEN1_TSEC3SER	0x40
+#define PIXIS_VSPEED2_MASK	(PIXIS_VSPEED2_TSEC1SER|PIXIS_VSPEED2_TSEC3SER)
+#define PIXIS_VCFGEN1_MASK	(PIXIS_VCFGEN1_TSEC1SER|PIXIS_VCFGEN1_TSEC3SER)
 
 
 /* define to use L1 as initial stack */
@@ -374,6 +376,7 @@
 #define CONFIG_TSEC3	1
 #define CONFIG_TSEC3_NAME	"eTSEC3"
 
+#define CONFIG_PIXIS_SGMII_CMD
 #define CONFIG_FSL_SGMII_RISER	1
 #define SGMII_RISER_PHY_OFFSET	0x1c