pc: Fix "prog_if" typo on PC_COMPAT_2_0

The property name is "prog_if", not "prof_if".
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reported-by: NBALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

include/hw/i386/pc.h

@@ -321,7 +321,7 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
         },\
         {\
             .driver   = "pci-serial-2x",\
-            .property = "prof_if",\
+            .property = "prog_if",\
             .value    = stringify(0),\
         },\
         {\