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/board/armadeus/apf27/fpga.c b/board/armadeus/apf27/fpga.c
index 5d989481..9e2f39f 100644
--- a/board/armadeus/apf27/fpga.c
+++ b/board/armadeus/apf27/fpga.c
@@ -10,6 +10,7 @@
  */
 #include <common.h>
 #include <log.h>
+#include <linux/delay.h>
 
 #include <asm/arch/imx-regs.h>
 #include <asm/gpio.h>