common: Drop init.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c
index 0d0ea43..a2bf19c 100644
--- a/drivers/clk/clk_stm32mp1.c
+++ b/drivers/clk/clk_stm32mp1.c
@@ -7,6 +7,7 @@
 #include <clk-uclass.h>
 #include <div64.h>
 #include <dm.h>
+#include <init.h>
 #include <regmap.h>
 #include <spl.h>
 #include <syscon.h>