x86: apl: Add pinctrl driver

Add a driver for the Apollo Lake pinctrl. This mostly makes use of the
common Intel pinctrl support.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/pinctrl/intel/Makefile b/drivers/pinctrl/intel/Makefile
index bc1aad2..3aed8e9 100644
--- a/drivers/pinctrl/intel/Makefile
+++ b/drivers/pinctrl/intel/Makefile
@@ -3,3 +3,4 @@
 # Copyright 2019 Google LLC
 
 obj-y += pinctrl.o
+obj-$(CONFIG_PINCTRL_INTEL_APL) += pinctrl_apl.o