ASoC: tegra_wm9712: Remove __devinitconst attribute

This has been removed from the kernel recently and gives following build errors:
sound/soc/tegra/tegra_wm9712.c:155:58: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘__devinitconst’
sound/soc/tegra/tegra_wm9712.c:165:21: error:
‘tegra_wm9712_of_match’ undeclared here (not in a function)

Cc: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>