iwlagn: fix default calibration table size

iwlagn driver uses the IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE
as the chain noise reset calibration index and
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE+1 as the chain noise gain
calibration index, if not specified by the TLV value in the new
firmware format.

However, this is broken if we need to add more calibrations like
the temperature offset calibration because we increased
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE by 1.

To fix this issue, define IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE
and use it as the calibration index instead. We still keep the
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE as a sanity check for
the TLV value given by ucode.

Signed-off-by: Shanyu Zhao <shanyu.zhao@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -2062,7 +2062,7 @@ static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
 	struct iwlagn_ucode_capabilities ucode_capa = {
 		.max_probe_length = 200,
 		.standard_phy_calibration_size =
-			IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE,
+			IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
 	};
 
 	memset(&pieces, 0, sizeof(pieces));

drivers/net/wireless/iwlwifi/iwl-commands.h

@@ -3784,7 +3784,8 @@ struct iwl_enhance_sensitivity_cmd {
  */
 
 /* Phy calibration command for series */
-
+/* The default calibrate table size if not specified by firmware */
+#define IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE	18
 enum {
 	IWL_PHY_CALIBRATE_DIFF_GAIN_CMD		= 7,
 	IWL_PHY_CALIBRATE_DC_CMD		= 8,