Merge pull request #12061 from OpenNuvoton/nuvoton_nano130_iar_dynamic_heap

NANO130: Support dynamic heap configuration on IAR

Author: 0xc0170

targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_IAR/NANO130.icf

@@ -11,7 +11,7 @@ define symbol __ICFEDIT_region_IRAM_start__ = 0x20000000;
 define symbol __ICFEDIT_region_IRAM_end__   = 0x20004000 - 1;
 /*-Sizes-*/
 define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_heap__   = 0xB00;
+define symbol __ICFEDIT_size_heap__   = 0x400;
 /**** End of ICF editor section. ###ICF###*/
 
 
@@ -21,7 +21,7 @@ define region IRAM_region  = mem:[from __ICFEDIT_region_IRAM_start__  to __ICFED
 
 define block ROMVEC    with alignment = 8                                   { readonly section .intvec };
 define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
-define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };
+define block HEAP      with expanding size, alignment = 8, minimum size = __ICFEDIT_size_heap__ { };
 
 
 initialize by copy with packing = none { readwrite };