update the start.S to check if the program is set at ITCM (not flash) then do not move codes
update the start.S to check if the program is set at ITCM (not flash) then do not move codes

SI-RISCV/e200_opensource,SI-RISCV/e200_opensource,SI-RISCV/e200_opensource,SI-RISCV/e200_opensource,SI-RISCV/e200_opensource