ARM: Add Gemini architecture v3

Adds support for Cortina Systems Gemini family CPUs:
http://www.cortina-systems.com/products/category/18

v3:
- fixed __io(a) to be defined as __typesafe_io(a)

v2:
- #include <asm/io.h> -> <linux/io.h>
- remove asm/system.h include
- revorked mm.c to use named initializers
- removed "empty" dma.h
- updated copyrights

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dbfdf87..5686f40 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -275,6 +275,12 @@
 	help
 	  This enables support for the Cirrus EP93xx series of CPUs.
 
+config ARCH_GEMINI
+	bool "Cortina Systems Gemini"
+	select CPU_FA526
+	help
+	  Support for the Cortina Systems Gemini family SoCs
+
 config ARCH_FOOTBRIDGE
 	bool "FootBridge"
 	select CPU_SA110
@@ -598,6 +604,8 @@
 
 source "arch/arm/mach-footbridge/Kconfig"
 
+source "arch/arm/mach-gemini/Kconfig"
+
 source "arch/arm/mach-integrator/Kconfig"
 
 source "arch/arm/mach-iop32x/Kconfig"