[bsp][GD32E503] fix project and link file

Author: meng-plus

bsp/gd32/arm/gd32e503v-eval/board/linker_scripts/link.icf

@@ -7,7 +7,7 @@ define symbol __ICFEDIT_intvec_start__ = 0x08000000;
 define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
 define symbol __ICFEDIT_region_ROM_end__   = 0x0807FFFF;
 define symbol __ICFEDIT_region_RAM_start__ = 0x20000000;
-define symbol __ICFEDIT_region_RAM_end__   = 0x201FFFF;
+define symbol __ICFEDIT_region_RAM_end__   = 0x2001FFFF;
 /*-Sizes-*/
 define symbol __ICFEDIT_size_cstack__ = 0x200;
 define symbol __ICFEDIT_size_heap__   = 0x200;