iwlwifi: parametrize configuration of the PLL for exclusion on 6000

added a config parameter to enable setting PLL_CFG.  older hardware has
this parameter set true.  the 6000 family does not support this setting,
so this parameter set false.

Signed-off-by: Jay Sternberg <jay.e.sternberg@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-100.c b/drivers/net/wireless/iwlwifi/iwl-100.c
index 4c4d165..a5df931 100644
--- a/drivers/net/wireless/iwlwifi/iwl-100.c
+++ b/drivers/net/wireless/iwlwifi/iwl-100.c
@@ -68,5 +68,6 @@
 	.mod_params = &iwl50_mod_params,
 	.valid_tx_ant = ANT_A,
 	.valid_rx_ant = ANT_AB,
+	.need_pll_cfg = true,
 };