clk: tegra: Remove forced clk_enable of uartd

The UART driver enables the console uart clock, so we don't need to do that
anymore in this file.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>