iwlwifi: avoid code duplication in stopping fw debug data recording

Make all FW debug data stop recording flows to use
iwl_fw_dbg_stop_recording function instead of writing to FW
registers directly.

Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c

@@ -55,6 +55,7 @@
 #include "iwl-context-info.h"
 #include "iwl-context-info-gen3.h"
 #include "internal.h"
+#include "fw/dbg.h"
 
 /*
  * Start up NIC's basic functionality after it has been reset
@@ -164,9 +165,7 @@ void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans, bool low_power)
 	trans_pcie->is_down = true;
 
 	/* Stop dbgc before stopping device */
-	iwl_write_prph(trans, DBGC_IN_SAMPLE, 0);
-	udelay(100);
-	iwl_write_prph(trans, DBGC_OUT_CTRL, 0);
+	iwl_fw_dbg_stop_recording(trans);
 
 	/* tell the device to stop sending interrupts */
 	iwl_disable_interrupts(trans);

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

@@ -1243,13 +1243,7 @@ static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
 	trans_pcie->is_down = true;
 
 	/* Stop dbgc before stopping device */
-	if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
-		iwl_set_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x100);
-	} else {
-		iwl_write_prph(trans, DBGC_IN_SAMPLE, 0);
-		udelay(100);
-		iwl_write_prph(trans, DBGC_OUT_CTRL, 0);
-	}
+	iwl_fw_dbg_stop_recording(trans);
 
 	/* tell the device to stop sending interrupts */
 	iwl_disable_interrupts(trans);