tree 50fb02982cf7edf9f821f5557904f5f82e3cea32
parent 2e8f83a0d5925e2aa995b35a77d6b38dd80e23d1
author Kever Yang <kever.yang@rock-chips.com> 1475827545 +0800
committer Simon Glass <sjg@chromium.org> 1477855746 -0600

evb-rk3399: config: set emmc as default boot dev

rk3399 has two mmc dev controller:
mmc 0: SD card;
mmc 1: EMMC

U-Boot will scan the mmc boot device configured by CONFIG_SYS_MMC_ENV_DEV,
since evb has emmc on board, let's set the EMMC as default.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>