mmc: tegra: convert to device tree support only
When compiling a kernel that supports only Tegra30 and not Tegra20, the SDHCI driver will fail to compile since the of_match_device() failure fallback code unconditinally references soc_data_tegra20, which is only compiled in when Tegra20 support is enabled. In Kernel 3.7, both Tegra20 and Tegra30 will only support booting using device tree, Hence, there is never a need to fall back to using soc_data_tegra20 if of_mach_device() fails. Instead, make this case an error. This removes the reference to soc_data_tegra20, and hence solves the compile failure. Signed-off-by: NJoseph Lo <josephl@nvidia.com> Tested-by: NStephen Warren <swarren@wwwdotorg.org> Signed-off-by: NChris Ball <cjb@laptop.org>
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