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/arm926ejs/mx27/timer.c b/arch/arm/cpu/arm926ejs/mx27/timer.c
index d6e1e09..408e88a 100644
--- a/arch/arm/cpu/arm926ejs/mx27/timer.c
+++ b/arch/arm/cpu/arm926ejs/mx27/timer.c
@@ -22,6 +22,7 @@
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/ptrace.h>
+#include <linux/delay.h>
 
 /* General purpose timers bitfields */
 #define GPTCR_SWR		(1 << 15)	/* Software reset	*/