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>

drivers/net/e100.c

@@ -1512,7 +1512,7 @@ static int e100_phy_init(struct nic *nic)
 
 static int e100_hw_init(struct nic *nic)
 {
-	int err;
+	int err = 0;
 
 	e100_hw_reset(nic);