dmp/vortex86ex: Initialize I2C controller base address/IRQ

Change-Id: Iefd6852f2300f703ebed8b52aee627107a024f85
Signed-off-by: Andrew Wu <arw@dmp.com.tw>
Reviewed-on: http://review.coreboot.org/4570
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/dmp/vortex86ex/Kconfig b/src/mainboard/dmp/vortex86ex/Kconfig
index 723a251..b1db0dc 100644
--- a/src/mainboard/dmp/vortex86ex/Kconfig
+++ b/src/mainboard/dmp/vortex86ex/Kconfig
@@ -50,6 +50,11 @@
 	hex
 	default 0x4800
 
+# SPI I/O base address control.
+config I2C_BASE
+	hex
+	default 0xfb00
+
 # ROM Strap PLL config setting :
 
 choice