Use standard initializers

The code currently uses GNU initializers as opposed to C99 initializers.
Clang emits a warning about this, causing the -Werror build to fail.
Either variant works fine in gcc.

BUG: 18017604

Change-Id: I196b809e085637e097706557ce62462dba8b2c3d
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>