ACPI: Remove unnecessary from/to-void* and to-void casts in drivers/acpi

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index e5e448e..bd96a70 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -248,7 +248,7 @@
 		handle = phandle;
 		status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
 		if (ACPI_SUCCESS(status))
-			return (int)pxm;
+			return pxm;
 		status = acpi_get_parent(handle, &phandle);
 	} while (ACPI_SUCCESS(status));
 	return -1;