Unify FYSETC F6 1.3 / 1.4 (#20507)

Co-authored-by: Scott Lahteine <github@thinkyhead.com>

.github/workflows/test-builds.yml

@@ -48,7 +48,7 @@ jobs:
 
         # Extended AVR Environments
 
-        - FYSETC_F6_13
+        - FYSETC_F6
         - mega1280
         - rambo
         - sanguino1284p

Marlin/src/pins/pins.h

@@ -163,9 +163,9 @@
 #elif MB(DAGOMA_F5)
   #include "ramps/pins_DAGOMA_F5.h"             // ATmega2560                             env:mega2560
 #elif MB(FYSETC_F6_13)
-  #include "ramps/pins_FYSETC_F6_13.h"          // ATmega2560                             env:FYSETC_F6_13
+  #include "ramps/pins_FYSETC_F6_13.h"          // ATmega2560                             env:FYSETC_F6
 #elif MB(FYSETC_F6_14)
-  #include "ramps/pins_FYSETC_F6_14.h"          // ATmega2560                             env:FYSETC_F6_14
+  #include "ramps/pins_FYSETC_F6_14.h"          // ATmega2560                             env:FYSETC_F6
 #elif MB(DUPLICATOR_I3_PLUS)
   #include "ramps/pins_DUPLICATOR_I3_PLUS.h"    // ATmega2560                             env:mega2560
 #elif MB(VORON)

buildroot/share/PlatformIO/boards/fysetc_f6.json

@@ -0,0 +1,34 @@
+{
+  "build": {
+    "core": "arduino",
+    "extra_flags": "-DARDUINO_AVR_MEGA2560",
+    "f_cpu": "16000000L",
+    "hwids": [
+      [
+        "0x27b2",
+        "0x0002"
+      ]
+    ],
+    "mcu": "atmega2560",
+    "variant": "fysetcf6"
+  },
+  "debug": {
+    "simavr_target": "atmega2560",
+    "avr-stub": {
+      "speed": 115200
+    }
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "FYSETC F6",
+  "upload": {
+    "maximum_ram_size": 8192,
+    "maximum_size": 258048,
+    "protocol": "wiring",
+    "require_upload_port": true,
+    "speed": 115200
+  },
+  "url": "https://www.fysetc.com/",
+  "vendor": "FYSETC"
+}

platformio.ini

@@ -505,20 +505,12 @@ extends  = common_avr8
 board    = reprap_rambo
 
 #
-# FYSETC F6 V1.3
+# FYSETC F6 V1.3 / V1.4
 #
-[env:FYSETC_F6_13]
+[env:FYSETC_F6]
 platform = atmelavr
 extends  = common_avr8
-board    = fysetc_f6_13
+board    = fysetc_f6
-
-#
-# FYSETC F6 V1.4
-#
-[env:FYSETC_F6_14]
-platform = atmelavr
-extends  = common_avr8
-board    = fysetc_f6_14
 
 #
 # Sanguinololu (ATmega644p)