iwlwifi: mvm: constify the parameters of a few functions in fw-dbg.c

The debug functions of fw-dbg.c don't really need to modify
the trigger and the description they receive as a parameter.
Constify the pointers.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.h
index 08148b2..f7dff76 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.h
@@ -72,11 +72,11 @@
 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm);
 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm);
 int iwl_mvm_fw_dbg_collect_desc(struct iwl_mvm *mvm,
-				struct iwl_mvm_dump_desc *desc,
-				struct iwl_fw_dbg_trigger_tlv *trigger);
+				const struct iwl_mvm_dump_desc *desc,
+				const struct iwl_fw_dbg_trigger_tlv *trigger);
 int iwl_mvm_fw_dbg_collect(struct iwl_mvm *mvm, enum iwl_fw_dbg_trigger trig,
 			   const char *str, size_t len,
-			   struct iwl_fw_dbg_trigger_tlv *trigger);
+			   const struct iwl_fw_dbg_trigger_tlv *trigger);
 int iwl_mvm_fw_dbg_collect_trig(struct iwl_mvm *mvm,
 				struct iwl_fw_dbg_trigger_tlv *trigger,
 				const char *fmt, ...) __printf(3, 4);