numa: show hex number in error message for consistency and prefix them with 0x

The error messages before and after patch are:

before:
qemu-system-x86_64: total memory for NUMA nodes (134217728) should equal RAM size (20000000)

after:
qemu-system-x86_64: total memory for NUMA nodes (0x8000000) should equal RAM size (0x20000000)

Cc: qemu-stable@nongnu.org
Signed-off-by: NHu Tao <hutao@cn.fujitsu.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

numa.c

@@ -210,8 +210,8 @@ void set_numa_nodes(void)
             numa_total += numa_info[i].node_mem;
         }
         if (numa_total != ram_size) {
-            error_report("total memory for NUMA nodes (%" PRIu64 ")"
-                         " should equal RAM size (" RAM_ADDR_FMT ")",
+            error_report("total memory for NUMA nodes (0x%" PRIx64 ")"
+                         " should equal RAM size (0x" RAM_ADDR_FMT ")",
                          numa_total, ram_size);
             exit(1);
         }