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/toradex/apalis-tk1/apalis-tk1.c b/board/toradex/apalis-tk1/apalis-tk1.c
index 3d80381..d77b4c4 100644
--- a/board/toradex/apalis-tk1/apalis-tk1.c
+++ b/board/toradex/apalis-tk1/apalis-tk1.c
@@ -15,6 +15,7 @@
 #include <asm/arch/pinmux.h>
 #include <env_internal.h>
 #include <pci_tegra.h>
+#include <linux/delay.h>
 #include <power/as3722.h>
 #include <power/pmic.h>