The existing code point tuples[*num_copied_tuples].value.s to elem->string
which works fine if there is only one topology is handled and all the
tuples are handled before the topology fw is released. However, we will
handle multiple topologies and the tuples may be used after the topology
fw is release. Ues devm_kasprintf to allocate the string for the tuples
to avoid invalid access.

Signed-off-by: Bard Liao <[email protected]>

No need to convert the return value of snd_soc_tplg_component_load().

Signed-off-by: Bard Liao <[email protected]>

Get device information from dai links and load topology for each device.
This allow user create a topology for single device. The driver will
select the needed topologies and we don't need to create topologies for
each product.

Signed-off-by: Bard Liao <[email protected]>