net: Move some header files to include/

The fsl_dtsec.h & fsl_tgec.h & fsl_fman.h can be shared on both ARM
and PPC, move it out of ppc to include/, and change the path in
drivers accordingly.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index 0c9d85e..101b8db 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -19,7 +19,7 @@
 #include <fsl_sec.h>
 #include <fsl_sfp.h>
 #include <asm/fsl_lbc.h>
-#include <asm/fsl_fman.h>
+#include <fsl_fman.h>
 #include <fsl_immap.h>
 
 typedef struct ccsr_local {