sam_smccc_call
res = sam_smccc_call(SAMA5_SMC_SIP_SET_SUSPEND_MODE,
res = sam_smccc_call(SAMA5_SMC_SIP_GET_SUSPEND_MODE, 0, 0);
struct arm_smccc_res sam_smccc_call(u32 fn, u32 arg0, u32 arg1);