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/arch/arm/mach-mediatek/mt7622/init.c b/arch/arm/mach-mediatek/mt7622/init.c
index a715378..7f6ce80 100644
--- a/arch/arm/mach-mediatek/mt7622/init.c
+++ b/arch/arm/mach-mediatek/mt7622/init.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <fdtdec.h>
+#include <init.h>
 #include <asm/armv8/mmu.h>
 #include <asm/cache.h>