The default parent for SDMMC1/3 clock sources can provide maximum frequency of 136MHz for SDR104 mode. Update parent clock source for SDMMC1/SDMMC3 instances to increase the output clock frequency to 195MHz and improve the perf. Signed-off-by: Aniruddha Rao <anrao@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>