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-zynqmp-r5/cpu.c b/arch/arm/mach-zynqmp-r5/cpu.c
index aa5de86..b3402d7 100644
--- a/arch/arm/mach-zynqmp-r5/cpu.c
+++ b/arch/arm/mach-zynqmp-r5/cpu.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <cpu_func.h>
+#include <init.h>
 #include <asm/armv7_mpu.h>
 
 DECLARE_GLOBAL_DATA_PTR;