x86, olpc-xo1-sci: Add lid switch functionality

Configure the XO-1's lid switch GPIO to trigger an SCI interrupt,
and correctly expose this input device which can be used as a wakeup
source.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Link: http://lkml.kernel.org/r/1309019658-1712-9-git-send-email-dsd@laptop.org
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8888910..350ccbb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2090,6 +2090,7 @@
 	   - EC-driven system wakeups
 	   - Power button
 	   - Ebook switch
+	   - Lid switch
 
 endif # X86_32