greybus: .gitignore: minor updates

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/drivers/staging/greybus/.gitignore b/drivers/staging/greybus/.gitignore
index a07ab9d..f7dc3ba 100644
--- a/drivers/staging/greybus/.gitignore
+++ b/drivers/staging/greybus/.gitignore
@@ -7,3 +7,6 @@
 *.swp
 .tmp_versions
 tags
+cscope.*
+ncscope.*
+*.patch