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/power/twl4030.c b/drivers/power/twl4030.c
index 4cc261a..b0d5cba 100644
--- a/drivers/power/twl4030.c
+++ b/drivers/power/twl4030.c
@@ -24,6 +24,7 @@
 
 #include <command.h>
 #include <twl4030.h>
+#include <linux/delay.h>
 
 /*
  * Power Reset