ARM: da850evm: Pinctrl for da850evm

The simple pin controller works for da850, so this patch enables
this to pin-mux the pins defined in the device tree for the da850evm.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/da850evm_defconfig b/configs/da850evm_defconfig
index 8ff918c..6dc70dd 100644
--- a/configs/da850evm_defconfig
+++ b/configs/da850evm_defconfig
@@ -51,6 +51,8 @@
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_SINGLE=y
 CONFIG_SPI_FLASH_MTD=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y