🔨 FYSETC S6 small bootloader target (#22207)

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

ini/stm32f4.ini

@@ -76,15 +76,28 @@ platform          = ${common_stm32.platform}
 extends           = common_stm32
 platform_packages = tool-stm32duino
 board             = marlin_fysetc_s6
-build_flags       = ${common_stm32.build_flags}
-  -DVECT_TAB_OFFSET=0x10000
-  -DHAL_PCD_MODULE_ENABLED
+build_flags       = ${common_stm32.build_flags} -DVECT_TAB_OFFSET=0x10000 -DHAL_PCD_MODULE_ENABLED
 extra_scripts     = ${common.extra_scripts}
   pre:buildroot/share/PlatformIO/scripts/generic_create_variant.py
 debug_tool        = stlink
 upload_protocol   = dfu
 upload_command    = dfu-util -a 0 -s 0x08010000:leave -D "$SOURCE"
 
+#
+# FYSETC S6 new bootloader
+#
+[env:FYSETC_S6_8000]
+platform                    = ${common_stm32.platform}
+extends                     = env:FYSETC_S6
+board                       = marlin_fysetc_s6_8000
+board_build.offset          = 0x8000
+board_upload.offset_address = 0x08008000
+build_flags                 = ${common_stm32.build_flags} -DHAL_PCD_MODULE_ENABLED
+extra_scripts               = ${common.extra_scripts}
+  pre:buildroot/share/PlatformIO/scripts/generic_create_variant.py
+  buildroot/share/PlatformIO/scripts/stm32_bootloader.py
+upload_command              = dfu-util -a 0 -s 0x08008000:leave -D "$SOURCE"
+
 #
 # STM32F407VET6 with RAMPS-like shield
 # 'Black' STM32F407VET6 board - https://wiki.stm32duino.com/index.php?title=STM32F407