arm: imx8ulp: add clock support

Add i.MX8ULP clock support

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx8ulp/Makefile b/arch/arm/mach-imx/imx8ulp/Makefile
index e8970dc..78c81d7 100644
--- a/arch/arm/mach-imx/imx8ulp/Makefile
+++ b/arch/arm/mach-imx/imx8ulp/Makefile
@@ -4,4 +4,4 @@
 #
 
 obj-y += lowlevel_init.o
-obj-y += soc.o clock.o iomux.o
+obj-y += soc.o clock.o iomux.o pcc.o cgc.o