ARM: socfpga: add support for IS1 board

This adds support for IS1 board. Pretty usual socfpga board,
256MB of RAM, does not have MMC, two SPI chips, one ethernet port, two
additional ethernet ports connected to the FPGA.

Signed-off-by: Pavel Machek <pavel@denx.de>
diff --git a/arch/arm/mach-socfpga/Kconfig b/arch/arm/mach-socfpga/Kconfig
index 1484607..c4432cf 100644
--- a/arch/arm/mach-socfpga/Kconfig
+++ b/arch/arm/mach-socfpga/Kconfig
@@ -35,6 +35,10 @@
 	bool "EBV SoCrates (Cyclone V)"
 	select TARGET_SOCFPGA_CYCLONE5
 
+config TARGET_SOCFPGA_IS1
+	bool "IS1 (Cyclone V)"
+	select TARGET_SOCFPGA_CYCLONE5
+
 config TARGET_SOCFPGA_SAMTEC_VINING_FPGA
 	bool "samtec VIN|ING FPGA (Cyclone V)"
 	select TARGET_SOCFPGA_CYCLONE5
@@ -53,6 +57,7 @@
 	default "arria5-socdk" if TARGET_SOCFPGA_ARRIA5_SOCDK
 	default "cyclone5-socdk" if TARGET_SOCFPGA_CYCLONE5_SOCDK
 	default "de0-nano-soc" if TARGET_SOCFPGA_TERASIC_DE0_NANO
+	default "is1" if TARGET_SOCFPGA_IS1
 	default "mcvevk" if TARGET_SOCFPGA_DENX_MCVEVK
 	default "sockit" if TARGET_SOCFPGA_TERASIC_SOCKIT
 	default "socrates" if TARGET_SOCFPGA_EBV_SOCRATES
@@ -75,6 +80,7 @@
 	default "socfpga_arria5_socdk" if TARGET_SOCFPGA_ARRIA5_SOCDK
 	default "socfpga_cyclone5_socdk" if TARGET_SOCFPGA_CYCLONE5_SOCDK
 	default "socfpga_de0_nano_soc" if TARGET_SOCFPGA_TERASIC_DE0_NANO
+	default "socfpga_is1" if TARGET_SOCFPGA_IS1
 	default "socfpga_mcvevk" if TARGET_SOCFPGA_DENX_MCVEVK
 	default "socfpga_sockit" if TARGET_SOCFPGA_TERASIC_SOCKIT
 	default "socfpga_socrates" if TARGET_SOCFPGA_EBV_SOCRATES