slub: Revert "[PARISC] slub: fix panic with DISCONTIGMEM"

This reverts commit 4a5fa3590f09, which did not allow SLUB to be used
on architectures that use DISCONTIGMEM without compiling NUMA support
without CONFIG_BROKEN also set.

The slub panic that it was intended to prevent is addressed by
d9b41e0b54fd ("[PARISC] set memory ranges in N_NORMAL_MEMORY when
onlined") on parisc so there is no further slub issues with such a
configuration.

The reverts allows SLUB now to be used on such architectures since
there haven't been any reports of additional errors.

Cc: James Bottomley <[e-mail]>
Signed-off-by: David Rientjes <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

init/Kconfig

···
 	  per cpu and per node queues.
 
 config SLUB
-	depends on BROKEN || NUMA || !DISCONTIGMEM
 	bool "SLUB (Unqueued Allocator)"
 	help
 	   SLUB is a slab allocator that minimizes cache line usage