arch, mm: remove arch specific show_mem

arch, mm: remove arch specific show_mem

We have a generic implementation for quite some time already.  If there
is any arch specific information to be printed then we should add a
callback called from the generic code rather than duplicate the whole
show_mem.

The current code has resulted in the code duplication and the output
divergence which is both confusing and adds maintainance costs.

Let's just get rid of this mess.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Michal Hocko <[email protected]>
Acked-by: Guan Xuetao <[email protected]> [UniCore32]
Acked-by: Helge Deller <[email protected]> [for parisc]
Acked-by: Chris Metcalf <[email protected]> [for tile]
Acked-by: Mel Gorman <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>