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/mach-omap2/omap5/hwinit.c b/arch/arm/mach-omap2/omap5/hwinit.c
index 3b17330..47ac865 100644
--- a/arch/arm/mach-omap2/omap5/hwinit.c
+++ b/arch/arm/mach-omap2/omap5/hwinit.c
@@ -18,6 +18,7 @@
 #include <asm/arch/cpu.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/clock.h>
+#include <linux/delay.h>
 #include <linux/sizes.h>
 #include <asm/utils.h>
 #include <asm/arch/gpio.h>