e100: fix build warning

In function 'e100_hw_init':
warning: 'err' may be used uninitialized in this function

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by:  Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index c810cda..29f812d 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -1512,7 +1512,7 @@
 
 static int e100_hw_init(struct nic *nic)
 {
-	int err;
+	int err = 0;
 
 	e100_hw_reset(nic);