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/fpga/zynqpl.c b/drivers/fpga/zynqpl.c
index e9bf3a6..dcfe513 100644
--- a/drivers/fpga/zynqpl.c
+++ b/drivers/fpga/zynqpl.c
@@ -14,6 +14,7 @@
 #include <asm/io.h>
 #include <fs.h>
 #include <zynqpl.h>
+#include <linux/delay.h>
 #include <linux/sizes.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/sys_proto.h>