Change beginning of file comments to avoid creating doxygen tag for esphome namespace (#3314)

esphome/components/rc522_spi/rc522_spi.h

@@ -1,3 +1,10 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/rc522/rc522.h"
+#include "esphome/components/spi/spi.h"
+
+namespace esphome {
 /**
  * Library based on https://github.com/miguelbalboa/rfid
  * and adapted to ESPHome by @glmnet
@@ -6,14 +13,6 @@
  *
  *
  */
-
-#pragma once
-
-#include "esphome/core/component.h"
-#include "esphome/components/rc522/rc522.h"
-#include "esphome/components/spi/spi.h"
-
-namespace esphome {
 namespace rc522_spi {
 
 class RC522Spi : public rc522::RC522,

esphome/components/sx1509/sx1509_registers.h

@@ -1,11 +1,15 @@
-/******************************************************************************
+/*
 sx1509_registers.h
 Register definitions for SX1509.
 Jim Lindblom @ SparkFun Electronics
 Original Creation Date: September 21, 2015
 https://github.com/sparkfun/SparkFun_SX1509_Arduino_Library
+*/
+#pragma once
 
-Here you'll find the Arduino code used to interface with the SX1509 I2C
+namespace esphome {
+/**
+ Here you'll find the Arduino code used to interface with the SX1509 I2C
 16 I/O expander. There are functions to take advantage of everything the
 SX1509 provides - input/output setting, writing pins high/low, reading
 the input value of pins, LED driver utilities (blink, breath, pwm), and
@@ -20,10 +24,7 @@ This code is beerware; if you see me (or any other SparkFun employee) at the
 local, and you've found our code helpful, please buy us a round!
 
 Distributed as-is; no warranty is given.
-******************************************************************************/
-#pragma once
-
-namespace esphome {
+*/
 namespace sx1509 {
 
 const uint8_t REG_INPUT_DISABLE_B =