qemu_domain.c: remove unneeded size check in NVDIMM alignment

Commit 5540acb9 added a minimum size verification for the target
size of ppc64 NVDIMMs but forgot to remove a MAX() size check that
was being used in earlier reviews of that commit. The size
verification makes this check unneeded since we're making sure
that guestArea will always be at least equal to ppc64AlignSize.

Fixes: 5540acb9Signed-off-by: NDaniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_domain.c

@@ -12686,8 +12686,6 @@ qemuDomainNVDimmAlignSizePseries(virDomainDefPtr def,
     }
 
     guestArea = (guestArea/ppc64AlignSize) * ppc64AlignSize;
-    guestArea = MAX(guestArea, ppc64AlignSize);
-
     mem->size = guestArea + mem->labelsize;
 
     return 0;