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/evb-rk3036_defconfig b/configs/evb-rk3036_defconfig
index 9894fff..2d5e5e0 100644
--- a/configs/evb-rk3036_defconfig
+++ b/configs/evb-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_SPL_SERIAL_PRESENT is not set
 CONFIG_DEBUG_UART=y