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-lpc32xx/timer.c b/arch/arm/mach-lpc32xx/timer.c
index 46b7b46..90183e3 100644
--- a/arch/arm/mach-lpc32xx/timer.c
+++ b/arch/arm/mach-lpc32xx/timer.c
@@ -10,6 +10,7 @@
 #include <asm/arch/clk.h>
 #include <asm/arch/timer.h>
 #include <asm/io.h>
+#include <linux/delay.h>
 
 static struct timer_regs  *timer0 = (struct timer_regs *)TIMER0_BASE;
 static struct timer_regs  *timer1 = (struct timer_regs *)TIMER1_BASE;