video: tegra: dc: consider clk src prop's absence
If display modules' clock source is not specified,
driver select default clk, already.
When nvidia,out-parent-clk doesn't exist, it should
not return fail.
Bug 1371533
Bug 200020901
Change-Id: I02328414aeccf1363187df00c00c30945aaa50b0
Signed-off-by: Min-wuk Lee <mlee@nvidia.com>
Reviewed-on: http://git-master/r/455941
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Reviewed-by: Animesh Kishore <ankishore@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
4 files changed