Restore patch series "arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"

As part of bringing the master branch back in to next, we need to allow
for all of these changes to exist here.

Reported-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/x86/include/asm/mp.h b/arch/x86/include/asm/mp.h
index f4c4d6c..7c08f7a 100644
--- a/arch/x86/include/asm/mp.h
+++ b/arch/x86/include/asm/mp.h
@@ -11,6 +11,7 @@
 #include <asm/atomic.h>
 #include <asm/cache.h>
 #include <linux/bitops.h>
+#include <linux/errno.h>
 
 struct udevice;