edac: move nr_pages to dimm struct

edac: move nr_pages to dimm struct

The number of pages is a dimm property. Move it to the dimm struct.

After this change, it is possible to add sysfs nodes for the DIMM's that
will properly represent the DIMM stick properties, including its size.

A TODO fix here is to properly represent dual-rank/quad-rank DIMMs when
the memory controller represents the memory via chip select rows.

Reviewed-by: Aristeu Rozanski <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Cc: Doug Thompson <[email protected]>
Cc: Mark Gross <[email protected]>
Cc: Jason Uhlenkott <[email protected]>
Cc: Tim Small <[email protected]>
Cc: Ranganathan Desikan <[email protected]>
Cc: "Arvind R." <[email protected]>
Cc: Olof Johansson <[email protected]>
Cc: Egor Martovetsky <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Joe Perches <[email protected]>
Cc: Dmitry Eremin-Solenikov <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Hitoshi Mitake <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: "Niklas Söderlund" <[email protected]>
Cc: Shaohui Xie <[email protected]>
Cc: Josh Boyer <[email protected]>
Cc: [email protected]
Signed-off-by: Mauro Carvalho Chehab <[email protected]>