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/drivers/serial/Makefile b/drivers/serial/Makefile
index 403ab1d..dbe598b 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -65,3 +65,4 @@
 ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_USB_TTY) += usbtty.o
 endif
+obj-$(CONFIG_UART4_SERIAL) += serial_adi_uart4.o