pnv/xive2: Quiet down some error messages

When dumping the END and NVP tables ("info pic" from the HMP) on the
P10 model, we're likely to be flooded with error messages such as:

  XIVE[0] - VST: invalid NVPT entry f33800 !?

The error is printed when finding an empty VSD in an indirect
table (thus END and NVP tables with skiboot), which is going to happen
when dumping the xive state. So let's tune down those messages. They
can be re-enabled easily with a macro if needed.

Those errors were already hidden on xive/P9, for the same reason.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20230531150537.369350-1-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

hw/intc/pnv_xive2.c

@@ -163,7 +163,9 @@ static uint64_t pnv_xive2_vst_addr_indirect(PnvXive2 *xive, uint32_t type,
     ldq_be_dma(&address_space_memory, vsd_addr, &vsd, MEMTXATTRS_UNSPECIFIED);
 
     if (!(vsd & VSD_ADDRESS_MASK)) {
+#ifdef XIVE2_DEBUG
         xive2_error(xive, "VST: invalid %s entry %x !?", info->name, idx);
+#endif
         return 0;
     }
 
@@ -185,7 +187,9 @@ static uint64_t pnv_xive2_vst_addr_indirect(PnvXive2 *xive, uint32_t type,
                    MEMTXATTRS_UNSPECIFIED);
 
         if (!(vsd & VSD_ADDRESS_MASK)) {
+#ifdef XIVE2_DEBUG
             xive2_error(xive, "VST: invalid %s entry %x !?", info->name, idx);
+#endif
             return 0;
         }