Increase system stack's reserved memory size (#4025)

Co-authored-by: あく <alleteam@gmail.com>

Author: Astrrra

targets/f7/stm32wb55xx_flash.ld

@@ -3,7 +3,7 @@ ENTRY(Reset_Handler)
 /* Highest address of the user mode stack */
 _stack_end = 0x20030000;    /* end of RAM */
 /* Generate a link error if heap and stack don't fit into RAM */
-_stack_size = 0x200; /* required amount of stack */
+_stack_size = 0x400; /* required amount of stack */
 
 MEMORY {
     FLASH (rx)  : ORIGIN = 0x08000000, LENGTH = 1024K

targets/f7/stm32wb55xx_ram_fw.ld

@@ -3,7 +3,7 @@ ENTRY(Reset_Handler)
 /* Highest address of the user mode stack */
 _stack_end = 0x20030000;    /* end of RAM */
 /* Generate a link error if heap and stack don't fit into RAM */
-_stack_size = 0x200; /* required amount of stack */
+_stack_size = 0x400; /* required amount of stack */
 
 MEMORY {
     FLASH (rx)  : ORIGIN = 0x08000000, LENGTH = 1024K