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/drivers/net/uli526x.c b/drivers/net/uli526x.c
index c568366..cfdd113 100644
--- a/drivers/net/uli526x.c
+++ b/drivers/net/uli526x.c
@@ -16,6 +16,7 @@
 #include <asm/io.h>
 #include <pci.h>
 #include <miiphy.h>
+#include <linux/delay.h>
 
 /* some kernel function compatible define */