arm: socfpga: Add Altera Arria V DK support

Add support for the Altera Arria V development kit.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@opensource.altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Pavel Machek <pavel@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Vince Bridgers <vbridger@opensource.altera.com>
diff --git a/configs/socfpga_arria5_defconfig b/configs/socfpga_arria5_defconfig
new file mode 100644
index 0000000..f290042
--- /dev/null
+++ b/configs/socfpga_arria5_defconfig
@@ -0,0 +1,3 @@
+CONFIG_SPL=y
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_SOCFPGA_ARRIA5=y