Revert "radio-iris: declare in a header, define in a source file"

This reverts commit 3482e8677083c6d4668921130950e9db9d98cf85.
Revert "radio: iris: transport: move radio_hci_smd_init to __init section"

This reverts commit 44228164aa6bebd96560df5f9ae6c541d7b94167.

Conflicts:
	drivers/media/radio/radio-iris-transport.c
Revert "radio: iris: fix smd init when iris-transport is not compiled as module"

This reverts commit b24d08c0471f89287a888d29056e6e23e644ac1b.

Conflicts:
	drivers/media/radio/radio-iris-transport.c
Revert "radio: iris: transport: move radio_hci_smd_init to __init section"

This reverts commit 44228164aa6bebd96560df5f9ae6c541d7b94167.