--legacyalign, --no_legacyalign are deprecated from ARMC6 compiler, in order to
remove deprecated flags all linker files (GCC and IAR as well to have uniformity)
should strictly align to 8-byte boundary
1, edit "targets.json" to let "REALTEK_RTL8195AM" target inherit from "MCU_RTL8195A"
2, change file structures for folder "Target_Realtek"
3, add "PeripheralPins.h" and "PeripheralPins.c"