rockchip: Add MAINTAINER files for kylin_rk3036, evb_rk3036

These boards should have maintainer entries. Add them.

Signed-off-by: Simon Glass <sjg@chromium.org>

board/evb_rk3036/evb_rk3036/MAINTAINERS

+EVB-RK3036
+M:      huang lin <hl@rock-chips.com>
+S:      Maintained
+F:      board/evb/evb-rk3036
+F:      include/configs/evb-rk3036.h
+F:      configs/evb-rk3036_defconfig

board/kylin/kylin_rk3036/MAINTAINERS

+KYLIN-RK3036
+M:      huang lin <hl@rock-chips.com>
+S:      Maintained
+F:      board/kylin/kylin-rk3036
+F:      include/configs/kylin-rk3036.h
+F:      configs/kylin-rk3036_defconfig