arm: dts: rk3399: Sync roc-pc-mezzanine from v5.7-rc1

Sync Firefly ROC-RK3399-PC Mezzanine Board dts file
from Linux v5.7-rc1.

Signed-off-by: Suniel Mahesh <sunil@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a683525..e1be8b4 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -132,6 +132,7 @@
 	rk3399-puma-ddr1600.dtb \
 	rk3399-puma-ddr1866.dtb \
 	rk3399-roc-pc.dtb \
+	rk3399-roc-pc-mezzanine.dtb \
 	rk3399-rock-pi-4.dtb \
 	rk3399-rock960.dtb \
 	rk3399-rockpro64.dtb