Fix undefined eeprom warnings in unicode processing

quantum/process_keycode/process_unicode.c

@@ -15,6 +15,7 @@
  */
 #include "process_unicode.h"
 #include "action_util.h"
+#include "eeprom.h"
 
 static uint8_t first_flag = 0;
 

quantum/process_keycode/process_unicode_common.c

@@ -15,6 +15,7 @@
  */
 
 #include "process_unicode_common.h"
+#include "eeprom.h"
 
 static uint8_t input_mode;
 uint8_t mods;