mb/sifive: Add HiFive Unleashed mainboard

Change-Id: I52ef2da9148809923c90178a00ba94babba8d2f8
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/25790
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/sifive/hifive-unleashed/Kconfig b/src/mainboard/sifive/hifive-unleashed/Kconfig
new file mode 100644
index 0000000..5e49f19
--- /dev/null
+++ b/src/mainboard/sifive/hifive-unleashed/Kconfig
@@ -0,0 +1,33 @@
+# This file is part of the coreboot project.
+#
+# Copyright (C) 2018 Jonathan Neuschäfer
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+if BOARD_SIFIVE_HIFIVE_UNLEASHED
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select SOC_SIFIVE_FU540
+	select BOARD_ROMSIZE_KB_32768
+
+config MAINBOARD_DIR
+	string
+	default sifive/hifive-unleashed
+
+config MAX_CPUS
+	int
+	default 4
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "HiFive Unleashed"
+
+endif