powerpc/85xx: add support for FM2 DTSEC5

Unlike previous SOCs, the Freescale P5040 has a fifth DTSEC on the second
Fman, so add the Fman and SerDes macros for that DTSEC.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/arch/powerpc/include/asm/fsl_serdes.h b/arch/powerpc/include/asm/fsl_serdes.h
index 0f31af1..22525f1 100644
--- a/arch/powerpc/include/asm/fsl_serdes.h
+++ b/arch/powerpc/include/asm/fsl_serdes.h
@@ -41,6 +41,7 @@
 	SGMII_FM2_DTSEC2,
 	SGMII_FM2_DTSEC3,
 	SGMII_FM2_DTSEC4,
+	SGMII_FM2_DTSEC5,
 	SGMII_TSEC1,
 	SGMII_TSEC2,
 	SGMII_TSEC3,