Break out storage related functions into their own file

KeyboardioFirmware.ino

@@ -127,22 +127,6 @@ void loop() {
 
 
 
-void save_primary_keymap(byte keymap) {
-    EEPROM.write(EEPROM_KEYMAP_LOCATION, keymap);
-}
-
-byte load_primary_keymap() {
-    byte keymap =  EEPROM.read(EEPROM_KEYMAP_LOCATION);
-    if (keymap >= KEYMAPS ) {
-        return 0; // undefined positions get saved as 255
-    }
-    return 0; //  return keymap;
-}
-
-
-
-
-
 // Sending events to the usb host
 
 void handle_synthetic_key_press(byte switchState, Key mappedKey) {

storage.cpp

@@ -0,0 +1,14 @@
+#include "storage.h"
+
+void save_primary_keymap(byte keymap) {
+    EEPROM.write(EEPROM_KEYMAP_LOCATION, keymap);
+}
+
+byte load_primary_keymap() {
+    byte keymap =  EEPROM.read(EEPROM_KEYMAP_LOCATION);
+    if (keymap >= KEYMAPS ) {
+        return 0; // undefined positions get saved as 255
+    }
+    return 0; //  return keymap;
+}
+

storage.h

@@ -0,0 +1,6 @@
+#include <Arduino.h>
+#include <EEPROM.h>
+#include "KeyboardConfig.h"
+
+void save_primary_keymap(byte keymap);
+byte load_primary_keymap();