🔨 Consolidate BTT linker scripts

Originally from MarlinFirmware#22022

Author: thinkyhead

buildroot/share/PlatformIO/ldscripts/STM32F103RE_SKR_E3_DIP.ld

@@ -154,6 +154,8 @@ extra_scripts        = ${common_stm32f1.extra_scripts}
 debug_tool           = jlink
 upload_protocol      = jlink
 
+#
+# BigTree SKR Mini E3 DIP / SKR CR6 (STM32F103RET6 ARM Cortex-M3)
 #
 #   STM32F103RE_btt ............. RET6
 #   STM32F103RE_btt_USB ......... RET6 (USB mass storage)
@@ -162,7 +164,7 @@ upload_protocol      = jlink
 platform          = ${common_stm32f1.platform}
 extends           = env:STM32F103RE_maple
 board_build.address  = 0x08007000
-board_build.ldscript = STM32F103RE_SKR_E3_DIP.ld
+board_build.ldscript = STM32F103RE_SKR_MINI_512K.ld
 extra_scripts     = ${common_stm32f1.extra_scripts}
   buildroot/share/PlatformIO/scripts/custom_board.py
 build_flags       = ${common_stm32f1.build_flags} -DDEBUG_LEVEL=0 -DSS_TIMER=4