Fixed wrong stack pointer

Author: andreas.larsson

targets/TARGET_STM/TARGET_STM32F4/TARGET_UBLOX_EVK_ODIN_W2/device/TOOLCHAIN_ARM_STD/startup_stm32f439xx.S

@@ -39,7 +39,7 @@
 ; 
 ;*******************************************************************************
 
-__initial_sp    EQU     0x20020000 ; Top of RAM
+__initial_sp    EQU     0x20030000 ; Top of RAM
 
                 PRESERVE8
                 THUMB