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/configs/orangepi_r1_defconfig b/configs/orangepi_r1_defconfig
new file mode 100644
index 0000000..8e6ee7b
--- /dev/null
+++ b/configs/orangepi_r1_defconfig
@@ -0,0 +1,16 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_SPL=y
+CONFIG_MACH_SUN8I_H3=y
+CONFIG_DRAM_CLK=624
+CONFIG_DRAM_ZQ=3881979
+CONFIG_DRAM_ODT_EN=y
+# CONFIG_VIDEO_DE2 is not set
+CONFIG_SPL_SPI_SUNXI=y
+CONFIG_DEFAULT_DEVICE_TREE="sun8i-h2-plus-orangepi-r1"
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_CONSOLE_MUX=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_SUN8I_EMAC=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y