iwlwifi: mvm: remove 8000 HW family setting of adc sampling on nic config

This patch removes the setting of the ADC sampling bits in
the mvm nic configuration. This setting is not required by
the firmware, and furthermore - it interferes with the DBGC
when it is running in DRAM mode on PCIe.
Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Reviewed-by: Dor Shaish <dor.shaish@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/ops.c

@@ -166,7 +166,14 @@ static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 	WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 		 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 
-	/* silicon bits */
+	/*
+	 * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
+	 * shouldn't be set to any non-zero value. The same is supposed to be
+	 * true of the other HW, but unsetting them (such as the 7260) causes
+	 * automatic tests to fail on seemingly unrelated errors. Need to
+	 * further investigate this, but for now we'll separate cases.
+	 */
+	if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 		reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 
 	iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,