GPIO KPSDK changes

	- gpio driver - sdk prefix, no lookuptable, input/output declaration, refactoring, set MUX to GPIO
	- gpio api in mbed implementation, tested on blue led

Author: 0xc0170

libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D5M/TOOLCHAIN_ARM_STD/MK20D5 - Copy.sct

@@ -0,0 +1,14 @@
+
+LR_IROM1 0x00000000 0x20000  {    ; load region size_region (132k)
+  ER_IROM1 0x00000000 0x20000  {  ; load address = execution address
+   *.o (RESET, +First)
+   *(InRoot$$Sections)
+   .ANY (+RO)
+  }
+  ; 8_byte_aligned(62 vect * 4 bytes) =  8_byte_aligned(0xF8) = 0xF8
+  ; 0x4000 - 0xF8 = 0x3F08
+  RW_IRAM1 0x1FFFE0F8 0x3F08 {
+   .ANY (+RW +ZI)
+  }
+}
+