ESP32: Fix some warnings

arch/xtensa/src/common/xtensa.h

@@ -278,7 +278,7 @@ void xtensa_add_region(void);
 
 void up_lowputc(char ch);
 #if CONFIG_NFILE_DESCRIPTORS > 0
-void xtensa_earlyserialinit(void);
+void xtensa_early_serial_initialize(void);
 void xtensa_serial_initialize(void);
 #else
 # define xtensa_earlyserialinit()

arch/xtensa/src/esp32/esp32_irq.c

@@ -47,6 +47,7 @@
 #include <arch/irq.h>
 
 #include "xtensa.h"
+#include "esp32_cpuint.h"
 
 /****************************************************************************
  * Public Data

arch/xtensa/src/esp32/esp32_serial.c

@@ -1178,7 +1178,7 @@ static bool esp32_txempty(struct uart_dev_s *dev)
  ****************************************************************************/
 
 #ifdef USE_EARLYSERIALINIT
-void up_earlyserialinit(void)
+void xtensa_early_serial_initialize(void)
 {
   /* NOTE:  All GPIO configuration for the UARTs was performed in
    * esp32_lowsetup

arch/xtensa/src/esp32/esp32_start.c

@@ -98,7 +98,7 @@ void IRAM_ATTR __start(void)
 #ifdef USE_EARLYSERIALINIT
  /* Perform early serial initialization */
 
-  xtensa_earlyserialinit();
+  xtensa_early_serial_initialize();
 #endif
 
   /* Initialize onboard resources */