Fix a path bug for MFCC RVV

Fix a path bug for MFCC RVV.

Change-Id: I4ae154c91beb958baabea3329747038d589c6b48

audio_prep/CMakeLists.txt

diff --git a/audio_prep/CMakeLists.txt b/audio_prep/CMakeLists.txt
index c8085de..5678353 100644
--- a/audio_prep/CMakeLists.txt
+++ b/audio_prep/CMakeLists.txt
@@ -21,7 +21,7 @@
 )
 
 if (${BUILD_MFCC_WITH_RVV})
-  target_compile_definitions(samples_audio_prep_mfcc PUBLIC MFCC_WITH_RVV)
+  target_compile_definitions(audio_prep_mfcc PUBLIC MFCC_WITH_RVV)
 endif()
 
 springbok_test(

audio_prep/mfcc.c

diff --git a/audio_prep/mfcc.c b/audio_prep/mfcc.c
index 22bf6b8..0a137e6 100644
--- a/audio_prep/mfcc.c
+++ b/audio_prep/mfcc.c
@@ -19,7 +19,6 @@
 #include "audio_prep/mfcc.h"
 
 #include <math.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>