+MODULE_LICENSE("GPL v2");
Just to be sure: Did you double-check if the original licenses were v2 or v2+?
It seems to me that sdhci-cns3xxx.c, sdhci-dove.c, sdhci-esdhc-imx.c and sdhci-tegra.c all use v2.
Actually I do not even know how v2+ is stated. Do you have an example for me to refer?
Check davinci_mmc.c (or grep for 'any later version').