audio: volume: add HiFi5 files to LLEXT build

added volume_hifi5.c and volume_hifi5_with_peakvol.c files
to the llext build configuration for the volume module
to provide full support for the HiFi5 platform.

Signed-off-by: Adrian Bonislawski <adrian.bonislawski@intel.com>

Author: abonislawski

src/audio/volume/llext/CMakeLists.txt

@@ -5,9 +5,11 @@ sof_llext_build("volume"
 	SOURCES ../volume_generic.c
 		../volume_hifi3.c
 		../volume_hifi4.c
+		../volume_hifi5.c
 		../volume_generic_with_peakvol.c
 		../volume_hifi3_with_peakvol.c
 		../volume_hifi4_with_peakvol.c
+		../volume_hifi5_with_peakvol.c
 		../volume.c
 		../volume_ipc4.c
 	LIB openmodules