[ARM] pxa/vpac270: add ide support

This patch adds support for the on-board IDE channel. I tested this with a CDROM
connected over 2.5-3.5 IDE reduction with external power supplied to the CDROM.
This was not tested with the Voipac 270-HDD-000 (official Voipac HDD module),
but I expect no problems.

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 e4a0452..3b51741 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -252,6 +252,7 @@
 config MACH_VPAC270
 	bool "Voipac PXA270"
 	select PXA27x
+	select HAVE_PATA_PLATFORM
 	help
 	  PXA270 based Single Board Computer.