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/include/phy_interface.h b/include/phy_interface.h
index 31be322..b74f4cc 100644
--- a/include/phy_interface.h
+++ b/include/phy_interface.h
@@ -11,6 +11,7 @@
 #define _PHY_INTERFACE_H
 
 #include <string.h>
+#include <linux/kernel.h>
 
 typedef enum {
 	PHY_INTERFACE_MODE_NA, /* don't touch */