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/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c
index b0e43ae..9b6a7fa 100644
--- a/drivers/pinctrl/pinctrl-stmfx.c
+++ b/drivers/pinctrl/pinctrl-stmfx.c
@@ -15,6 +15,7 @@
 #include <dm/lists.h>
 #include <dm/pinctrl.h>
 #include <linux/bitfield.h>
+#include <linux/delay.h>
 #include <power/regulator.h>
 
 /* STMFX pins = GPIO[15:0] + aGPIO[7:0] */