🔨 Fix FYSETC S6 envs (#22421)

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

buildroot/share/PlatformIO/boards/marlin_fysetc_s6.json

@@ -21,7 +21,7 @@
   "name": "3D Printer control board",
   "upload": {
     "maximum_ram_size": 131072,
-    "maximum_size": 458752,
+    "maximum_size": 524288,
     "protocol": "stlink",
     "protocols": [
       "jlink",

buildroot/share/PlatformIO/boards/marlin_fysetc_s6_8000.json

@@ -1,35 +0,0 @@
-{
-  "build": {
-    "cpu": "cortex-m4",
-    "extra_flags": "-DSTM32F446xx",
-    "f_cpu": "180000000L",
-    "mcu": "stm32f446ret6",
-    "variant": "MARLIN_FYSETC_S6"
-  },
-  "connectivity": [
-    "can"
-  ],
-  "debug": {
-    "jlink_device": "STM32F446RE",
-    "openocd_target": "stm32f4x",
-    "svd_path": "STM32F446x.svd"
-  },
-  "frameworks": [
-    "arduino",
-    "stm32cube"
-  ],
-  "name": "3D Printer control board",
-  "upload": {
-    "maximum_ram_size": 131072,
-    "maximum_size": 491520,
-    "protocol": "stlink",
-    "protocols": [
-      "jlink",
-      "stlink",
-      "blackmagic",
-      "serial"
-    ]
-  },
-  "url": "https://www.st.com/en/microcontrollers-microprocessors/stm32f446.html",
-  "vendor": "FYSETC"
-}

buildroot/share/PlatformIO/variants/MARLIN_FYSETC_S6/ldscript.ld

@@ -60,8 +60,8 @@ _Min_Stack_Size = 0x400;; /* required amount of stack */
 /* Specify the memory areas */
 MEMORY
 {
-FLASH (rx)      : ORIGIN = 0x8010000, LENGTH = 512K
+RAM (xrw) : ORIGIN = 0x20000000,  LENGTH = LD_MAX_DATA_SIZE
-RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 128K
+FLASH (rx)  : ORIGIN = 0x8000000 + LD_FLASH_OFFSET, LENGTH = LD_MAX_SIZE - LD_FLASH_OFFSET
 }
 
 /* Define output sections */

ini/stm32f4.ini

@@ -82,7 +82,7 @@ upload_command              = dfu-util -a 0 -s 0x08010000:leave -D "$SOURCE"
 [env:FYSETC_S6_8000]
 platform                    = ${common_stm32.platform}
 extends                     = env:FYSETC_S6
-board                       = marlin_fysetc_s6_8000
+board                       = marlin_fysetc_s6
 board_build.offset          = 0x8000
 board_upload.offset_address = 0x08008000
 upload_command              = dfu-util -a 0 -s 0x08008000:leave -D "$SOURCE"