doc: develop: process: Add note about asking for feedback

It can be unclear to contributors what to do if they haven't gotten any
feedback on patches they have submitted. Add a sentence saying that if
they feel it's been too long without any comment, it's OK to reply
again.

Signed-off-by: Tom Rini <trini@konsulko.com>

doc/develop/process.rst

diff --git a/doc/develop/process.rst b/doc/develop/process.rst
index 0c6fb31..4bfbf0e 100644
--- a/doc/develop/process.rst
+++ b/doc/develop/process.rst
@@ -139,7 +139,9 @@
 message is better than nothing. Also, if there are remarks to a
 patch, these should leave no doubt if they were just comments and the
 patch will be accepted anyway, or if the patch should be
-reworked/resubmitted, or if it was rejected.
+reworked/resubmitted, or if it was rejected. However, if a submitter
+feels it has been too long since posting their patch and not received
+any feedback, it is OK to follow-up and ask.
 
 Review Process, Git Tags
 ------------------------