[linux-next] Build failure drivers/cxl/cxl_pmem (powerpc)

[Sachin Sant]

Linux-next (5.19.0-rc8-next-20220728) fails to build on powerpc with
following error:

ERROR: modpost: "memory_add_physaddr_to_nid" [drivers/cxl/cxl_pmem.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:128: modules-only.symvers] Error 1

The code in question was last changed by following patch:

commit 04ad63f086d1
       cxl/region: Introduce cxl_pmem_region objects


 - Sachin