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
diff --git a/plat/imx/imx8ulp/include/platform_def.h b/plat/imx/imx8ulp/include/platform_def.h
index d5f4033..e8e72e5 100644
--- a/plat/imx/imx8ulp/include/platform_def.h
+++ b/plat/imx/imx8ulp/include/platform_def.h
@@ -65,6 +65,7 @@
 #define IMX_SIM2_BASE			U(0x2da50000)
 #define IMX_CGC2_BASE			U(0x2da60000)
 #define IMX_PCC5_BASE			U(0x2da70000)
+#define IMX_MU0B_BASE			U(0x29220000)
 #define IMX_CMC1_BASE			U(0x29240000)
 #define IMX_WUU1_BASE			U(0x29260000)
 #define IMX_SIM1_BASE			U(0x29290000)