platforms/astbmc: Don't validate model on palmetto

The platform isn't compatible with palmetto until the root device-tree
node's "model" property is NULL or "palmetto". However, we could have
"TN71-BP012" for the property on palmetto.

   linux# cat /proc/device-tree/model
   TN71-BP012

This skips the validation on root device-tree node's "model" property
on palmetto, meaning we check the "compatible" property only.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

platforms/astbmc/palmetto.c

@@ -105,15 +105,8 @@ static const struct slot_table_entry palmetto_phb_table[] = {
 
 static bool palmetto_probe(void)
 {
-	const char *model;
-
-	if (!dt_node_is_compatible(dt_root, "ibm,powernv"))
-		return false;
-
-	/* Temporary ... eventually we'll get that in compatible */
-	model = dt_prop_get_def(dt_root, "model", NULL);
-	if ((!model || !strstr(model, "palmetto")) &&
-	    (!dt_node_is_compatible(dt_root, "tyan,palmetto")))
+	if (!dt_node_is_compatible(dt_root, "ibm,powernv") ||
+	    !dt_node_is_compatible(dt_root, "tyan,palmetto"))
 		return false;
 
 	/* Lot of common early inits here */