[ALM:10872982] [FP4]:solve tof driver crash

 &&&%%%comment:[FP4]:solve tof driver crash

 &&&%%%bug number:10872982

 &&&%%%product name:sm7225_r_fp4

 &&&%%%root cause:coding

 &&&%%%Bug category:T2M

 &&&%%%Module_Impact:kernel

 &&&%%%Test_Suggestion:NA

 &&&%%%Solution:NA

 &&&%%%Test_Report:ok in native

 &&&%%%VAL Can Test:NA