mips builds failing in v3.18.38 and v4.1.29

[Guenter Roeck]

Sorry I didn't notice earlier - my 3.18/4.1 build scripts were broken.

arch/mips/kernel/setup.c: In function 'arch_mem_init':
arch/mips/kernel/setup.c:689:2: error: implicit declaration of function 'reserve_bootmem_region'

Offending commit is 1dd0964204277108e ("MIPS: Reserve nosave data for hibernation").
It fixes a bug which does not exist in 3.18 / 4.1, in turn causing all mips builds in 3.18
and 4.1 to fail.

Guenter