Audio: Template component: Add missing llext sources

[singalsu]

The build of template component as module fails because of wrong and missing file names for needed source files for build.

[singalsu]

@lgirdwood I'm maybe missing still something. This component still fails to load in my MTL laptop if I set CONFIG_COMP_TEMPLATE_COMP=m.

[  847.335788] <err> ipc: ipc4_get_comp_drv: Error: Couldn't find loadable module with id 4096.
[  847.335798] <err> ipc: ipc4_init_module_instance: error: failed to init module 1000 : 0
[  847.335801] <err> ipc: ipc_cmd: ipc4: MODULE_MSG failed with err 104

Same topology works if the kconfig is in normal =y setting.

[Copilot]

Pull Request Overview

This PR fixes the build configuration for the template audio component when built as a loadable module (llext). The CMakeLists.txt file was referencing incorrect source file names that prevented successful module compilation.

• Updated source file references from incorrect template_comp.c to the correct filenames
• Added missing source files template-generic.c and template-ipc4.c required for the build

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[lgirdwood]

@lgirdwood I'm maybe missing still something. This component still fails to load in my MTL laptop if I set CONFIG_COMP_TEMPLATE_COMP=m.

[  847.335788] <err> ipc: ipc4_get_comp_drv: Error: Couldn't find loadable module with id 4096.
[  847.335798] <err> ipc: ipc4_init_module_instance: error: failed to init module 1000 : 0
[  847.335801] <err> ipc: ipc_cmd: ipc4: MODULE_MSG failed with err 104

Same topology works if the kconfig is in normal =y setting.

This could mean the kernel is not loading the module, can you turn on kernel IPC logging and see if kernel loads the module from file system to IMR.