chore: unified maple upload method

Requires stm32duino/Arduino_Tools#89

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

platform.txt

@@ -199,14 +199,13 @@ tools.hid_upload.upload.params.quiet=n
 tools.hid_upload.upload.pattern="{path}/{cmd}" "{build.path}/{build.project_name}.bin" {serial.port.file}
 
 # Upload using Maple bootloader over DFU
-tools.maple_upload.cmd=maple_upload.sh
-tools.maple_upload.cmd.windows=maple_upload.bat
-tools.maple_upload.path={runtime.tools.STM32Tools.path}/win
-tools.maple_upload.path.macosx={runtime.tools.STM32Tools.path}/macosx
-tools.maple_upload.path.linux={runtime.tools.STM32Tools.path}/linux
+tools.maple_upload.script=maple_upload.sh
+tools.maple_upload.busybox=
+tools.maple_upload.busybox.windows={path}/win/busybox.exe
+tools.maple_upload.path={runtime.tools.STM32Tools.path}
 tools.maple_upload.upload.params.verbose=-d
 tools.maple_upload.upload.params.quiet=n
-tools.maple_upload.upload.pattern="{path}/{cmd}" {serial.port.file} {upload.altID} {upload.usbID} "{build.path}/{build.project_name}.bin"
+tools.maple_upload.upload.pattern="{busybox}" sh "{path}/{script}" {serial.port.file} {upload.altID} {upload.usbID} "{build.path}/{build.project_name}.bin"
 
 # STM32MP1 self-contained shell script
 tools.remoteproc_gen.path={runtime.tools.STM32Tools.path}