clk: imx: select SPL_CLK_COMPOSITE_CCF when SPL_CLK_IMX8MP

If SPL_CLK_IMX8MP is selected alone, it causes a build error.
The clock composite is required when using the clock framework, so
select it when SPL_CLK_IMX8MP is enabled.  This is already being
done outside of SPL.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index 56d893e..d17a54f 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -60,6 +60,7 @@
 	depends on ARCH_IMX8M && SPL
 	select SPL_CLK
 	select SPL_CLK_CCF
+	select SPL_CLK_COMPOSITE_CCF
 	help
 	  This enables SPL DM/DTS support for clock driver in i.MX8MP