Staging: add Kconfig entries and Makefile infrastructure

This hooks up the drivers/staging directory to the build system

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/Kconfig b/drivers/Kconfig
index 59f33fa..d19b6f5 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -101,4 +101,6 @@
 source "drivers/uio/Kconfig"
 
 source "drivers/xen/Kconfig"
+
+source "drivers/staging/Kconfig"
 endmenu