ARM: mvebu: Add Armada 388 General Purpose Development Board support

The A388-GP is a board produced by Marvell that holds

- 1 PCIe slot
- 2 mini PCIe slot (one of them is multiplexed with the PCIe slot,
  muxing is selected through the GPIO expander)
- 1 16MB SPI-NOR
- 2 Gigabit Ethernet ports
- 4 SATA ports (2 of them are multiplexed with the mini PCIe slots,
  muxing is selected through the GPIO expander)
- 1 SDIO slot
- 1 USB3 port
- 2 USB2 port
- 2 GPIO/interrupts expander on I2C

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 3ed928e..17ee1d6 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -537,6 +537,7 @@
 dtb-$(CONFIG_MACH_ARMADA_38X) += \
 	armada-385-db-ap.dtb \
 	armada-388-db.dtb \
+	armada-388-gp.dtb \
 	armada-388-rd.dtb
 dtb-$(CONFIG_MACH_ARMADA_XP) += \
 	armada-xp-axpwifiap.dtb \