[ARM] pxa: add basic support for Voipac PXA270 SBC

This patch adds basic support for the Voipac PXA270 SBC.
The device consists of the following hardware:
- PXA270 @ 520 MHz
- 256MB RAM (sparsemem, 2*128MB regions)
- 64MB NOR flash
- 640x480 LCD
- Ports: 2xUHC, 1xUDC, 1xPCMCIA, VGA, FFUART, 2xPS2, Speaker, MIC

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 2e4122d..e4a0452 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -249,6 +249,12 @@
 	select PXA3xx
 	select CPU_PXA320
 
+config MACH_VPAC270
+	bool "Voipac PXA270"
+	select PXA27x
+	help
+	  PXA270 based Single Board Computer.
+
 comment "End-user Products (sorted by vendor name)"
 
 config MACH_H4700