fsp: Ignore platform dump notification on P9

After system crash FSP collects dump and passes dump details via HDAT.
OPAL/Linux uses this detail to extract SYSDUMP.

P9 FSP system we have MPIPL support. FSP folks says we have to ignore
platform dump notification passed by HDAT and use inband MPIPL mechanism
to extract dump.

CC: Murulidhar Nataraju <murulidhar@in.ibm.com>
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

hw/fsp/fsp-dump.c

@@ -825,6 +825,9 @@ static void check_ipl_sys_dump(void)
 	struct dt_node *dump_node;
 	uint32_t dump_id, dump_size;
 
+	if (proc_gen >= proc_gen_p9)
+		return;
+
 	dump_node = dt_find_by_path(dt_root, "ipl-params/platform-dump");
 	if (!dump_node)
 		return;