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/sh/lib/time_sh2.c b/arch/sh/lib/time_sh2.c
index ef7c607..5484c54 100644
--- a/arch/sh/lib/time_sh2.c
+++ b/arch/sh/lib/time_sh2.c
@@ -12,6 +12,7 @@
 #include <time.h>
 #include <asm/io.h>
 #include <asm/processor.h>
+#include <linux/delay.h>
 
 #define CMT_CMCSR_INIT	0x0001	/* PCLK/32 */
 #define CMT_CMCSR_CALIB 0x0000