arm: add initial support for the Phytium Durian Board

This adds platform code and the device tree for the Phytium Durian Board.
The initial support comprises the UART and the PCIE.

Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>

Signed-off-by: Steven Hao <liuhao@phytium.com.cn>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 71aab85..13603b9 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -51,6 +51,13 @@
 	  Say Y here if you want to enable support for generic ECAM-based
 	  PCIe host controllers, such as the one emulated by QEMU.
 
+config PCI_PHYTIUM
+	bool "Phytium PCIe support"
+	depends on DM_PCI
+	help
+	  Say Y here if you want to enable PCIe controller support on
+	  Phytium SoCs.
+
 config PCIE_DW_MVEBU
 	bool "Enable Armada-8K PCIe driver (DesignWare core)"
 	depends on DM_PCI