config: rk3036: enable fix regulator

usb host vbus power is using gpio fix regulator, enable it.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/kylin-rk3036_defconfig b/configs/kylin-rk3036_defconfig
index 5a8b85a..631d1f5 100644
--- a/configs/kylin-rk3036_defconfig
+++ b/configs/kylin-rk3036_defconfig
@@ -32,6 +32,7 @@
 CONFIG_ROCKCHIP_DWMMC=y
 CONFIG_PINCTRL=y
 CONFIG_ROCKCHIP_RK3036_PINCTRL=y
+CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_RAM=y
 CONFIG_SYSRESET=y
 CONFIG_CMD_DHRYSTONE=y