sun8i: h2: Add initial Orange Pi R1 support

Orange Pi R1 is an open-source single-board computer using the
Allwinner H2+ SOC.

H2+ Orange Pi R1 has
 - Quad-core Cortex-A7
 - 256MB DDR3
 - micrSD slot
 - 128MBit SPI Nor flash
 - Debug TTL UART
 - 100MBit/s Ethernet (H2+)
 - 100MBit/s Ethernet (RTL8152B)
 - Wifi (RTL8189ETV)
 - USB 2.0 OTG + power supply
This board is very similar to the Orange Pi Zero.

The device tree file is copied from the Linux kernel 4.17.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 493652e..297160b 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -358,6 +358,7 @@
 	sun8i-a83t-tbs-a711.dts
 dtb-$(CONFIG_MACH_SUN8I_H3) += \
 	sun8i-h2-plus-libretech-all-h3-cc.dtb \
+	sun8i-h2-plus-orangepi-r1.dtb \
 	sun8i-h2-plus-orangepi-zero.dtb \
 	sun8i-h3-bananapi-m2-plus.dtb \
 	sun8i-h3-libretech-all-h3-cc.dtb \