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/sandbox_defconfig b/configs/sandbox_defconfig
index 89ebe92..2067f87 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -120,7 +120,7 @@
 CONFIG_PCI_SANDBOX=y
 CONFIG_PINCTRL=y
 CONFIG_PINCONF=y
-CONFIG_ROCKCHIP_PINCTRL=y
+CONFIG_ROCKCHIP_RK3288_PINCTRL=y
 CONFIG_ROCKCHIP_3036_PINCTRL=y
 CONFIG_PINCTRL_SANDBOX=y
 CONFIG_DM_PMIC=y