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/board/microchip/mpfs_icicle/mpfs_icicle.c b/board/microchip/mpfs_icicle/mpfs_icicle.c
index 0ef2431..8381361 100644
--- a/board/microchip/mpfs_icicle/mpfs_icicle.c
+++ b/board/microchip/mpfs_icicle/mpfs_icicle.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <init.h>
 #include <asm/io.h>
 
 #define MPFS_SYSREG_SOFT_RESET	((unsigned int *)0x20002088)