FMC: add a driver to write mezzanine EEPROM

This driver allows to reprogram the EEPROM in a mezzanine, to store
its own identifiers during manufacturing or to save other useful data.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Juan David Gonzalez Cobas <dcobas@cern.ch>
Acked-by: Emilio G. Cota <cota@braap.org>
Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/Documentation/fmc/00-INDEX b/Documentation/fmc/00-INDEX
index c22d687..177c3e4 100644
--- a/Documentation/fmc/00-INDEX
+++ b/Documentation/fmc/00-INDEX
@@ -30,3 +30,6 @@
 
 fmc-trivial.txt
 	- about drivers/fmc/fmc-trivial.ko
+
+fmc-write-eeprom.txt
+        - about drivers/fmc/fmc-write-eeprom.ko