cosmetic: rockchip: rk3036: pinctrl: fix config symbol naming

Rockchip socs are always named rkxxxx in all places, as also shown
by the naming of the rk3036 pinctrl file itself.
Therefore also name the config symbol according to this scheme.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/kylin-rk3036_defconfig b/configs/kylin-rk3036_defconfig
index 0ff6c6b..51196aa 100644
--- a/configs/kylin-rk3036_defconfig
+++ b/configs/kylin-rk3036_defconfig
@@ -32,7 +32,7 @@
 CONFIG_DM_MMC=y
 CONFIG_ROCKCHIP_DWMMC=y
 CONFIG_PINCTRL=y
-CONFIG_ROCKCHIP_3036_PINCTRL=y
+CONFIG_ROCKCHIP_RK3036_PINCTRL=y
 CONFIG_RAM=y
 CONFIG_USE_PRIVATE_LIBGCC=y
 CONFIG_CMD_DHRYSTONE=y