bus: tegra-aconnect: Remove PM_CLK dependency

The ACONNECT bus driver does not use pm-clk interface anymore and hence
the dependency can be removed from its Kconfig option.

Fixes: 0d7dab92

 ("bus: tegra-aconnect: use devm_clk_*() helpers")
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>