Update handwired/frenchdev keyboard (#5443)

keyboards/handwired/frenchdev/frenchdev.h

@@ -1,10 +1,9 @@
-#ifndef FRENCHDEV_V1_H
-#define FRENCHDEV_V1_H
+#pragma once
 
 #include "quantum.h"
 #include <stdint.h>
 #include <stdbool.h>
-#include "i2cmaster.h"
+#include "i2c_master.h"
 #include <util/delay.h>
 
 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
@@ -24,6 +23,7 @@
 #define OLATB           0x15
 
 extern uint8_t mcp23018_status;
+#define I2C_TIMEOUT 100
 
 void init_frenchdev(void);
 void frenchdev_blink_all_leds(void);
@@ -111,5 +111,3 @@ inline void frenchdev_led_all_set(uint8_t n)
     { k51,   k41,  k31,   k21,   k11,   k01   },   \
     { k50,   k40,  k30,   k20,   k10,   KC_NO }   \
    }
-
-#endif