marvell: armada385: Add the Turris Omnia board

The Turris Omnia is a open-source router created by CZ.NIC.

The code is based on the Marvell/db-88f6820-gp by Stefan Roese
with modifications from Tomas Hlavacek in the CZ.NIC turris-omnia-uboot
repository, which can be found at
https://gitlab.labs.nic.cz/turris/turris-omnia-uboot

By default, the Turris Omnia uses btrfs as the main and only filesystem,
and also loads kernel and device tree from this filesystem. Since U-Boot
does not yet support btrfs, you should not flash your Turris Omnia board
with this unless you know what you are doing.

Signed-off-by: Tomas Hlavacek <tomas.hlavacek@nic.cz>
Signed-off-by: Marek Behun <marek.behun@nic.cz>

 create mode 100644 board/CZ.NIC/turris_omnia/Makefile
 create mode 100644 board/CZ.NIC/turris_omnia/kwbimage.cfg
 create mode 100644 board/CZ.NIC/turris_omnia/turris_omnia.c
 create mode 100644 configs/turris_omnia_defconfig
 create mode 100644 include/configs/turris_omnia.h
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 3e48d58..01d700b 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -92,6 +92,10 @@
 	bool "Support DB-88F6820-AMC"
 	select 88F6820
 
+config TARGET_TURRIS_OMNIA
+	bool "Support Turris Omnia"
+	select 88F6820
+
 config TARGET_MVEBU_ARMADA_8K
 	bool "Support Armada 7k/8k platforms"
 	select ARMADA_8K
@@ -128,6 +132,7 @@
 	default "db-88f6720" if TARGET_DB_88F6720
 	default "db-88f6820-gp" if TARGET_DB_88F6820_GP
 	default "db-88f6820-amc" if TARGET_DB_88F6820_AMC
+	default "turris_omnia" if TARGET_TURRIS_OMNIA
 	default "mvebu_armada-8k" if TARGET_MVEBU_ARMADA_8K
 	default "db-mv784mp-gp" if TARGET_DB_MV784MP_GP
 	default "ds414" if TARGET_DS414
@@ -145,6 +150,7 @@
 	default "ds414" if TARGET_DS414
 	default "maxbcm" if TARGET_MAXBCM
 	default "theadorable" if TARGET_THEADORABLE
+	default "turris_omnia" if TARGET_TURRIS_OMNIA
 
 config SYS_VENDOR
 	default "Marvell" if TARGET_DB_MV784MP_GP
@@ -155,10 +161,26 @@
 	default "Marvell" if TARGET_MVEBU_ARMADA_8K
 	default "solidrun" if TARGET_CLEARFOG
 	default "Synology" if TARGET_DS414
+	default "CZ.NIC" if TARGET_TURRIS_OMNIA
 
 config SYS_SOC
 	default "mvebu"
 
+if TARGET_TURRIS_OMNIA
+
+choice
+	prompt "Turris Omnia boot method"
+
+config TURRIS_OMNIA_SPL_BOOT_DEVICE_SPI
+	bool "SPI NOR flash"
+
+config TURRIS_OMNIA_SPL_BOOT_DEVICE_MMC
+	bool "SDIO/MMC card"
+
+endchoice
+
+endif
+
 config MVEBU_EFUSE
 	bool "Enable eFuse support"
 	default n