[ARM] pxa: add support for CSB701 baseboard

CSB701 is one of baseboards that can be used with CSB726 SOM.
This currently adds support for button and LED on the board.
More to come later.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index ff1872d..d13282d 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -401,6 +401,10 @@
 	  Say Y here if you intend to run this kernel on a Cogent
 	  CSB726 System On Module.
 
+config CSB726_CSB701
+	bool "Enable supprot for CSB701 baseboard"
+	depends on MACH_CSB726
+
 config PXA_EZX
 	bool "Motorola EZX Platform"
 	select PXA27x