tests: Add mbedtls_test_ prefix to unhexify_alloc()

Add mbedtls_test_ prefix to unhexify_alloc() test helper
functions.

Command to change *.function files:
find . -name "*.function" -exec awk -i inplace \
    '{sub(/unhexify_alloc\>/,"mbedtls_test_&")}1' {} \;

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/suites/test_suite_aes.function b/tests/suites/test_suite_aes.function
index 8fe0bda..887cee8 100644
--- a/tests/suites/test_suite_aes.function
+++ b/tests/suites/test_suite_aes.function
@@ -119,14 +119,14 @@
 
     mbedtls_aes_xts_init( &ctx );
 
-    data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
+    data_unit = mbedtls_test_unhexify_alloc( hex_data_unit_string, &data_unit_len );
     TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );
 
-    key = unhexify_alloc( hex_key_string, &key_len );
+    key = mbedtls_test_unhexify_alloc( hex_key_string, &key_len );
     TEST_ASSERT( key_len % 2 == 0 );
 
-    src = unhexify_alloc( hex_src_string, &src_len );
-    dst = unhexify_alloc( hex_dst_string, &dst_len );
+    src = mbedtls_test_unhexify_alloc( hex_src_string, &src_len );
+    dst = mbedtls_test_unhexify_alloc( hex_dst_string, &dst_len );
     TEST_ASSERT( src_len == dst_len );
 
     output = mbedtls_test_zero_alloc( dst_len );
@@ -162,14 +162,14 @@
 
     mbedtls_aes_xts_init( &ctx );
 
-    data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
+    data_unit = mbedtls_test_unhexify_alloc( hex_data_unit_string, &data_unit_len );
     TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );
 
-    key = unhexify_alloc( hex_key_string, &key_len );
+    key = mbedtls_test_unhexify_alloc( hex_key_string, &key_len );
     TEST_ASSERT( key_len % 2 == 0 );
 
-    src = unhexify_alloc( hex_src_string, &src_len );
-    dst = unhexify_alloc( hex_dst_string, &dst_len );
+    src = mbedtls_test_unhexify_alloc( hex_src_string, &src_len );
+    dst = mbedtls_test_unhexify_alloc( hex_dst_string, &dst_len );
     TEST_ASSERT( src_len == dst_len );
 
     output = mbedtls_test_zero_alloc( dst_len );