u-boot-tegra: fix UBOOT_CONFIG type usage
u-boot-tegra: fix UBOOT_CONFIG type usage

Signed-off-by: Matt Madison <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@madison.systems>

jackmitch/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,jackmitch/meta-tegra,madisongh/meta-tegra,jackmitch/meta-tegra