arm: Prevent redefinition error in fsl-layerscape

The include/phy.h will start including dm.h, which pulls in
linux/compat.h after the attempted redefinition in
arch/arm/include/asm/armv8/mmu.h, so move this include to allow
redefinition.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

arch/arm/cpu/armv8/fsl-layerscape/cpu.c

@@ -9,6 +9,7 @@
 #include <asm/io.h>
 #include <linux/errno.h>
 #include <asm/system.h>
+#include <fm_eth.h>
 #include <asm/armv8/mmu.h>
 #include <asm/io.h>
 #include <asm/arch/fsl_serdes.h>
@@ -18,7 +19,6 @@
 #include <fsl_immap.h>
 #include <asm/arch/mp.h>
 #include <efi_loader.h>
-#include <fm_eth.h>
 #include <fsl-mc/fsl_mc.h>
 #ifdef CONFIG_FSL_ESDHC
 #include <fsl_esdhc.h>