We need to use imx8qxp internal watchdog
I did the following tests：
In kernel imx8_wdt.c
int imx8_wdt_start(struct watchdog_device *wdog)
{
arm_smccc_smc(FSL_SIP_SRTC, FSL_SIP_SRTC_START_WDOG, 0, 0, 0, 0, 0, 0, &res);
}
But，FSL_SIP_SRTC_START_WDOG not called into the corresponding function of scfw
thanks
