pinctrl: bcm6838: add pinctrl support

Add pinctrl support for broadcom bcm6838 SoC.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/drivers/pinctrl/broadcom/Makefile b/drivers/pinctrl/broadcom/Makefile
index 99c7c23..f94f3ce 100644
--- a/drivers/pinctrl/broadcom/Makefile
+++ b/drivers/pinctrl/broadcom/Makefile
@@ -5,3 +5,4 @@
 # https://spdx.org/licenses
 
 obj-$(CONFIG_PINCTRL_BCM283X) += pinctrl-bcm283x.o
+obj-$(CONFIG_PINCTRL_BCM6838) += pinctrl-bcm6838.o