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>

drivers/Kconfig

@@ -101,4 +101,6 @@ source "drivers/auxdisplay/Kconfig"
 source "drivers/uio/Kconfig"
 
 source "drivers/xen/Kconfig"
+
+source "drivers/staging/Kconfig"
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