x86/PCI: Preserve existing pci=bfsort whitelist for Dell systems

Commit 6e8af08dfa40b747002207d3ce8e8b43a050d99f enables pci=bfsort on
future Dell systems. But the identification string 'Dell System' matches
on already existing whitelist, which do not have SMBIOS type 0xB1,
causing pci=bfsort not being set on existing whitelist.

This patch fixes the regression by moving the type 0xB1 check beyond the
existing whitelist so that existing whitelist is walked before.

Signed-off-by: Shyam Iyer <shyam_iyer@dell.com>
Signed-off-by: Narendra K <narendra_k@dell.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

arch/x86/pci/common.c

@@ -246,13 +246,6 @@ static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = {
 		},
 	},
 #endif		/* __i386__ */
-	{
-		.callback = find_sort_method,
-		.ident = "Dell System",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
-		},
-	},
 	{
 		.callback = set_bf_sort,
 		.ident = "Dell PowerEdge 1950",
@@ -293,6 +286,13 @@ static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"),
 		},
 	},
+	{
+		.callback = find_sort_method,
+		.ident = "Dell System",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
+		},
+	},
 	{
 		.callback = set_bf_sort,
 		.ident = "HP ProLiant BL20p G3",