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/regulator/s2mps11_regulator.c b/drivers/power/regulator/s2mps11_regulator.c
index 67d1f96..a6b4f15 100644
--- a/drivers/power/regulator/s2mps11_regulator.c
+++ b/drivers/power/regulator/s2mps11_regulator.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <dm.h>
 #include <i2c.h>
+#include <linux/delay.h>
 #include <power/pmic.h>
 #include <power/regulator.h>
 #include <power/s2mps11.h>