common: Drop linux/delay.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/cpu/armv7/stv0991/reset.c b/arch/arm/cpu/armv7/stv0991/reset.c
index 008e271..fb67de1 100644
--- a/arch/arm/cpu/armv7/stv0991/reset.c
+++ b/arch/arm/cpu/armv7/stv0991/reset.c
@@ -8,6 +8,7 @@
 #include <cpu_func.h>
 #include <asm/io.h>
 #include <asm/arch/stv0991_wdru.h>
+#include <linux/delay.h>
 void reset_cpu(ulong ignored)
 {
 	puts("System is going to reboot ...\n");