Fix Fysetc SD FW bootloader addr / size requirement (#18246)

buildroot/share/PlatformIO/ldscripts/fysetc_stm32f103rc.ld

 MEMORY
 {
 	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 48K
-	rom (rx)  : ORIGIN = 0x08010000, LENGTH = 256K - 64K
+	rom (rx)  : ORIGIN = 0x08008000, LENGTH = 256K - 32K
 }
 
 /* Provide memory region aliases for common.inc */

buildroot/share/PlatformIO/scripts/STM32F103RC_fysetc.py

 from os.path import expandvars
 Import("env")
 
-# Relocate firmware from 0x08000000 to 0x08010000
+# Relocate firmware from 0x08000000 to 0x08008000
 #for define in env['CPPDEFINES']:
 #    if define[0] == "VECT_TAB_ADDR":
 #        env['CPPDEFINES'].remove(define)
-#env['CPPDEFINES'].append(("VECT_TAB_ADDR", "0x08010000"))
+#env['CPPDEFINES'].append(("VECT_TAB_ADDR", "0x08008000"))
 
 #custom_ld_script = os.path.abspath("buildroot/share/PlatformIO/ldscripts/fysetc_stm32f103rc.ld")
 #for i, flag in enumerate(env["LINKFLAGS"]):