We have two helpers with confusing names and different purposes.

Rename bus_get_link() and bus_get_link_at() as bus_get_hlink_by_name()
and bus_get_hlink_by_addr() respectively.

No functionality change
Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: NRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: NRander Wang <rander.wang@intel.com>
Reviewed-by: NPéter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20221019162115.185917-5-pierre-louis.bossart@linux.intel.comSigned-off-by: NTakashi Iwai <tiwai@suse.de>