ACPICA: Fix miscellaneous warnings under gcc 4+

Some possible warnings with gcc 4+, especially with extended warnings
enabled

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/rsxface.c b/drivers/acpi/acpica/rsxface.c
index 69a2aa5..395212b 100644
--- a/drivers/acpi/acpica/rsxface.c
+++ b/drivers/acpi/acpica/rsxface.c
@@ -338,13 +338,17 @@
 	switch (resource->type) {
 	case ACPI_RESOURCE_TYPE_ADDRESS16:
 
-		address16 = (struct acpi_resource_address16 *)&resource->data;
+		address16 =
+		    ACPI_CAST_PTR(struct acpi_resource_address16,
+				  &resource->data);
 		ACPI_COPY_ADDRESS(out, address16);
 		break;
 
 	case ACPI_RESOURCE_TYPE_ADDRESS32:
 
-		address32 = (struct acpi_resource_address32 *)&resource->data;
+		address32 =
+		    ACPI_CAST_PTR(struct acpi_resource_address32,
+				  &resource->data);
 		ACPI_COPY_ADDRESS(out, address32);
 		break;