cosmetic: rockchip: rk3288: pinctrl: fix config symbol naming

The rk3288 pinctrl is very specific to this soc, so should
not hog the generic rockchip naming.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/rock2_defconfig b/configs/rock2_defconfig
index 3e16b80..3b6d7d9 100644
--- a/configs/rock2_defconfig
+++ b/configs/rock2_defconfig
@@ -44,7 +44,7 @@
 CONFIG_PINCTRL=y
 CONFIG_SPL_PINCTRL=y
 # CONFIG_SPL_PINCTRL_FULL is not set
-CONFIG_ROCKCHIP_PINCTRL=y
+CONFIG_ROCKCHIP_RK3288_PINCTRL=y
 CONFIG_DM_PMIC=y
 # CONFIG_SPL_PMIC_CHILDREN is not set
 CONFIG_PMIC_ACT8846=y