softmmu: Dont clobber retaddr in slow_ldx().

When splitting up unaligned IO accesses, ld calls slow_ld which was
clobbering retaddr.

AFAIK the problem only shows up when running emulations with -icount
that may abort TB execution on IO accesses.
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

softmmu_template.h

@@ -152,7 +152,6 @@ static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
             /* IO access */
             if ((addr & (DATA_SIZE - 1)) != 0)
                 goto do_unaligned_access;
-            retaddr = GETPC();
             addend = env->iotlb[mmu_idx][index];
             res = glue(io_read, SUFFIX)(addend, addr, retaddr);
         } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {