Stefan made a good point about it only applying to serial flash chips. But as Carl-Daniel noted, this functionality is not used by anything at all currently. Perhaps a comment or something can be added to note that it should only be used for chips conforming to Intel's multiple page write spec?
I see no problem with the patch, and it isn't bit-rotten or interferes with anything.
Acked-by: Sean Nelson <audiohacked@gmail.com>