ARM: 6910/1: MTD: physmap: let set_vpp() pass a platform_device instead of a map_info

ARM: 6910/1: MTD: physmap: let set_vpp() pass a platform_device instead of a map_info

The set_vpp() method provided by physmap passes a map_info back to
the platform code, which has little relevance as far as the platform
is concerned (this parameter is completely unused).

Instead, pass the platform_device, which can be used in the pismo
driver to retrieve some important information in a nicer way, instead
of the hack that was in place.

The empty set_vpp function in board-at572d940hf_ek.c is left untouched,
as the board/SoC is scheduled for removal.

Cc: Andrew Victor <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: Eric Miao <[email protected]>
Cc: Ben Dooks <[email protected]>
Acked-by: Artem Bityutskiy <[email protected]>
Acked-by: David Woodhouse <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Signed-off-by: Russell King <[email protected]>