board/freescale: add the DM_ETH changes for the PPC DPAA platforms

Add the required changes for compiling with DM_ETH on the PPC
DPAA platforms.

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/board/freescale/t104xrdb/t104xrdb.c b/board/freescale/t104xrdb/t104xrdb.c
index 6a4b351..04b2308 100644
--- a/board/freescale/t104xrdb/t104xrdb.c
+++ b/board/freescale/t104xrdb/t104xrdb.c
@@ -152,8 +152,10 @@
 #endif
 
 #ifdef CONFIG_SYS_DPAA_FMAN
+#ifndef CONFIG_DM_ETH
 	fdt_fixup_fman_ethernet(blob);
 #endif
+#endif
 
 	if (hwconfig("qe-tdm"))
 		fdt_del_diu(blob);