imx: imx8mp: add basic clock

i.MX8MP has similar architecture as i.MX8MN, but it has different
clk root and index, so add that to make i.MX8MP could use
the non-dm clock driver.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx8m/Makefile b/arch/arm/mach-imx/imx8m/Makefile
index db4ba30..d9dee89 100644
--- a/arch/arm/mach-imx/imx8m/Makefile
+++ b/arch/arm/mach-imx/imx8m/Makefile
@@ -5,4 +5,4 @@
 obj-y += lowlevel_init.o
 obj-y += clock_slice.o soc.o
 obj-$(CONFIG_IMX8MQ) += clock_imx8mq.o
-obj-$(CONFIG_IMX8MM)$(CONFIG_IMX8MN) += clock_imx8mm.o
+obj-$(CONFIG_IMX8MM)$(CONFIG_IMX8MN)$(CONFIG_IMX8MP) += clock_imx8mm.o