lib/show_mem.c: remove redundant include

show_mem.c doesn't use anything from nmi.h. Removing it yields identical
objdump -d output for each of {allyes,allno,def}config and eliminates more
than 100 lines in the dependency file.

Signed-off-by: Rasmus Villemoes <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/show_mem.c

···
  */
 
 #include <linux/mm.h>
-#include <linux/nmi.h>
 #include <linux/quicklist.h>
 #include <linux/cma.h>