HID: Documentation for hidraw

Documenation for the hidraw driver, with sample program.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/samples/Kconfig b/samples/Kconfig
index e03cf0e..52f4264 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -61,4 +61,10 @@
 	  Build an example of how to dynamically add the hello
 	  command to the kdb shell.
 
+config SAMPLE_HIDRAW
+	tristate "Build simple hidraw example"
+	depends on HIDRAW
+	help
+	  Build an example of how to use hidraw from userspace.
+
 endif # SAMPLES