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/m68k/cpu/mcf5445x/cpu.c b/arch/m68k/cpu/mcf5445x/cpu.c
index 2608fdd..886f29d 100644
--- a/arch/m68k/cpu/mcf5445x/cpu.c
+++ b/arch/m68k/cpu/mcf5445x/cpu.c
@@ -15,6 +15,7 @@
 #include <watchdog.h>
 #include <command.h>
 #include <netdev.h>
+#include <linux/delay.h>
 
 #include <asm/immap.h>
 #include <asm/io.h>
diff --git a/arch/m68k/cpu/mcf5445x/pci.c b/arch/m68k/cpu/mcf5445x/pci.c
index 09bd745..af02c49 100644
--- a/arch/m68k/cpu/mcf5445x/pci.c
+++ b/arch/m68k/cpu/mcf5445x/pci.c
@@ -11,6 +11,7 @@
 #include <pci.h>
 #include <asm/io.h>
 #include <asm/immap.h>
+#include <linux/delay.h>
 
 #if defined(CONFIG_PCI)
 /* System RAM mapped over PCI */