drm/amd/display: Fix spelling mistakes of function name in error message

The function name is being reported as dc_link_contruct when it is
actually dc_link_construct_phy. Fix this by using %s and the __func__
for the function name.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>