spapr: Drop dead code in spapr_reallocate_hpt()

Sometimes QEMU needs to allocate the HPT in userspace, namely with TCG
or PR KVM. This is performed with qemu_memalign() because of alignment
requirements. Like glib's allocators, its behaviour is to abort on OOM
instead of returning NULL.

This could be changed to qemu_try_memalign(), but in the specific case
of spapr_reallocate_hpt(), the outcome would be to terminate QEMU anyway
since no HPT means no MMU for the guest. Drop the dead code instead.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <160398562892.32380.15006707861753544263.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ppc/spapr.c

@@ -1522,12 +1522,6 @@ int spapr_reallocate_hpt(SpaprMachineState *spapr, int shift, Error **errp)
         int i;
 
         spapr->htab = qemu_memalign(size, size);
-        if (!spapr->htab) {
-            error_setg_errno(errp, errno,
-                             "Could not allocate HPT of order %d", shift);
-            return -ENOMEM;
-        }
-
         memset(spapr->htab, 0, size);
         spapr->htab_shift = shift;