Merge pull request #4065 from NXPmicro/K66_Move_bss_to_RAM2

K66F: Move bss section to m_data_2 Section

Author: sg-

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K66F/device/TOOLCHAIN_GCC_ARM/MK66FN2M0xxx18.ld

@@ -223,7 +223,7 @@ SECTIONS
     . = ALIGN(4);
     __bss_end__ = .;
     __END_BSS = .;
-  } > m_data
+  } > m_data_2
 
   .heap :
   {