[ARM] pxa: add basic support for Colibri PXA300 module

This patch add basic support for Toradex' Colibri PXA300 module.
Ethernet is enabled conditionally, depdending on CONFIG_AX88796.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index fd21bba..1a93888 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -265,6 +265,11 @@
 	bool "Toradex Colibri PXA270"
 	select PXA27x
 
+config MACH_COLIBRI300
+	bool "Toradex Colibri PXA300"
+	select PXA3xx
+	select CPU_PXA300
+
 config MACH_ZYLONITE
 	bool "PXA3xx Development Platform (aka Zylonite)"
 	select PXA3xx