iwlagn: separate init calib and rt calib

My previous patch for init calib cfg disable a set of calibration for both
init and runtime which cause performance issue, Fix it

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index d0fd6f0..3af49ae 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1222,7 +1222,7 @@
 	};
 
 	memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
-	calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
+	calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 	calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 
 	return iwl_trans_send_cmd(trans(priv), &cmd);