feat(imx8ulp): allow RTD to reset APD through MU

Clear HRM bit in MU0_B CCR0 register to allow RTD to reset APD.
The action needs at both ATF init and APD resume.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I2475e34b13f57818580a478ab567bfb9fc6cf174
3 files changed