Updated i2c and serial files to most recent from the lets split firmware. Also updated that_canadian keymap

keyboards/minidox/split_util.c

@@ -21,7 +21,8 @@ static void setup_handedness(void) {
   #ifdef EE_HANDS
     isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
   #else
-    #ifdef I2C_MASTER_RIGHT
+    // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
+    #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
       isLeftHand = !has_usb();
     #else
       isLeftHand = has_usb();
@@ -32,6 +33,9 @@ static void setup_handedness(void) {
 static void keyboard_master_setup(void) {
 #ifdef USE_I2C
     i2c_master_init();
+#ifdef SSD1306OLED
+    matrix_master_OLED_init ();
+#endif
 #else
     serial_master_init();
 #endif