[SUNHME]: Use PCI config space if hm-rev property does not exist.

drivers/net/sunhme.c

@@ -3092,8 +3092,12 @@ static int __init happy_meal_pci_init(struct pci_dev *pdev)
 
 #ifdef __sparc__
 	hp->hm_revision = prom_getintdefault(node, "hm-rev", 0xff);
-	if (hp->hm_revision == 0xff)
-		hp->hm_revision = 0xa0;
+	if (hp->hm_revision == 0xff) {
+		unsigned char prev;
+
+		pci_read_config_byte(pdev, PCI_REVISION_ID, &prev);
+		hp->hm_revision = 0xc0 | (prev & 0x0f);
+	}
 #else
 	/* works with this on non-sparc hosts */
 	hp->hm_revision = 0x20;
@@ -3102,7 +3106,7 @@ static int __init happy_meal_pci_init(struct pci_dev *pdev)
 	/* Now enable the feature flags we can. */
 	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
 		hp->happy_flags = HFLAG_20_21;
-	else if (hp->hm_revision != 0xa0)
+	else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
 		hp->happy_flags = HFLAG_NOT_A0;
 
 	if (qp != NULL)