KNOWN ISSUES

1./ With building with "gcc version 4.6.3 (Sourcery CodeBench Lite 2012.03-57)",
    Some issue is found when running on the ek board.

2./ With older gcc , version below 5.0, there are reported errors on accessing
eMMC and SD-Card devices, namely when using 8-bit bus width.
It is recommended to use toolchain newer than 6.0.

