Revert "soc: intel_adsp: only implement FW_STATUS boot protocol for cavs"

This breaks SOF load on MTL devices.  See SOF bug for details:
https://github.com/thesofproject/sof/issues/9243

This reverts commit fa798ce2d5.

Signed-off-by: Andy Ross <andyross@google.com>

soc/intel/intel_adsp/cavs/CMakeLists.txt

@@ -11,7 +11,6 @@ zephyr_library_sources(
     sram.c
     power.c
     power_down_cavs.S
-    boot_complete.c
     )
 
 if(CONFIG_SMP OR CONFIG_MP_MAX_NUM_CPUS GREATER 1)

soc/intel/intel_adsp/common/CMakeLists.txt

@@ -16,6 +16,7 @@ zephyr_library_sources(
     boot.c
     soc.c
     mem_window.c
+    boot_complete.c
     )
 
 zephyr_library_sources_ifdef(CONFIG_ADSP_CLOCK clk.c)