feat(imx8ulp): add the initial XRDC support

Add the initial xRDC support on i.MX8ULP.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I93ea8e2cebb049e6f20e71cfe50c7583a3228f38
diff --git a/plat/imx/imx8ulp/platform.mk b/plat/imx/imx8ulp/platform.mk
index e075bf4..510785a 100644
--- a/plat/imx/imx8ulp/platform.mk
+++ b/plat/imx/imx8ulp/platform.mk
@@ -31,6 +31,7 @@
 				lib/cpus/aarch64/cortex_a35.S		\
 				drivers/delay_timer/delay_timer.c	\
 				drivers/delay_timer/generic_delay_timer.c \
+				plat/imx/imx8ulp/xrdc/xrdc_core.c		\
 				plat/imx/imx8ulp/imx8ulp_caam.c         \
 				drivers/scmi-msg/base.c			\
 				drivers/scmi-msg/entry.c		\