e1000e: enable CRC stripping by default

CRC stripping should be enabled by default but was not if it was not
specified as a module parameter.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/e1000e/param.c

@@ -427,6 +427,8 @@ void __devinit e1000e_check_options(struct e1000_adapter *adapter)
 			e1000_validate_option(&crc_stripping, &opt, adapter);
 			if (crc_stripping == OPTION_ENABLED)
 				adapter->flags2 |= FLAG2_CRC_STRIPPING;
+		} else {
+			adapter->flags2 |= FLAG2_CRC_STRIPPING;
 		}
 	}
 	{ /* Kumeran Lock Loss Workaround */