Lib: Add to dai-legacy.h "struct dai" new member "type"

[singalsu]

The IPC4 testbench build fails without this change in copier_gain.c switch case to check for dd->dai->type for DMIC. Testbench is using the legacy header to avoid to include zephyr drivers headers with a lot more
dependencies.

[lgirdwood]

SOFCI TEST

[lgirdwood]

@abonislawski @kv2019i fyi Unrelated issue in prepare() on 10th iteration - logged #9584

[  667.113728] <inf> pipe: pipeline_connect: comp:3 0x10003 connect buffer 0 as sink
[  667.113731] <inf> pipe: pipeline_connect: comp:3 0x30006 connect buffer 0 as source
[  667.114208] <inf> ipc: ipc_cmd: rx	: 0x45030006|0x30004
[  667.114258] <inf> ipc: buffer_new: buffer new size 0x300 id 3.0 flags 0x0
[  667.114270] <inf> pipe: pipeline_connect: comp:3 0x30006 connect buffer 0 as sink
[  667.114273] <inf> pipe: pipeline_connect: comp:3 0x30004 connect buffer 0 as source
[  667.114725] <inf> ipc: ipc_cmd: rx	: 0x13030003|0x0
[  667.115293] <inf> ipc: ipc_cmd: rx	: 0x13030004|0x0
[  667.115411] <inf> dai_intel_ssp: dai_ssp_get_properties: SSP32: fifo 172304, handshake 3, init delay 0
[  667.115416] <inf> dai_intel_ssp: dai_ssp_get_properties: SSP32: fifo 172304, handshake 3, init delay 0
[  667.115433] <inf> copier: copier_prepare: comp:3 0x30004 copier_prepare()
[  667.115441] <err> dai_comp: dai_common_config_prepare: comp:3 0x30004 dma_request_channel() failed
[  667.115455] <err> module_adapter: module_prepare: comp:3 0x30004 module_prepare() error -5: module specific prepare failed, comp_id 196612
[  667.115460] <err> module_adapter: module_adapter_prepare: comp:3 0x30004 module_adapter_prepare() error fffffffb: module prepare failed
[  667.115465] <err> pipe: pipeline_prepare: pipe:3 0x0 pipeline_prepare(): ret = -5, dev->comp.id = 0x10003
[  667.115468] <err> ipc: ipc4_pcm_params: ipc: pipe 3 comp 0 prepare failed -5
[  667.115518] <inf> component: comp_set_state: comp:3 0x30004 comp_set_state(), state already set to 2

[kv2019i]

sof-docs fail, windows-linux-comparison fail and Intel LNL fails all known and tracked in https://github.com/thesofproject/sof/issues?q=is%3Aissue+is%3Aopen+label%3ACI