Fix parantheses on return and sizeof statements.

Used script:
```
import re
import sys

for arg in sys.argv[1:]:
    print(arg)
    with open(arg, 'r') as file:
        content = file.read()
        content = re.sub(r"return\s?\((?!.*\).*\()\s*\n?(.*)\n?\);", r"return \1;", \
            content, flags = re.M)
        content = re.sub(r"sizeof ([^\(][a-zA-Z0-9_\[\]]*)", r"sizeof(\1)",\
            content, flags = re.M)
    with open(arg, 'w') as file:
        file.write(content)

```
Executed with:
` find . -regextype posix-egrep -regex ".*\.([hc]|fmt|function)" | xargs -L1 python script.py`

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/tests/suites/test_suite_entropy.function b/tests/suites/test_suite_entropy.function
index c26f4f8..6f72add 100644
--- a/tests/suites/test_suite_entropy.function
+++ b/tests/suites/test_suite_entropy.function
@@ -39,11 +39,11 @@
             *olen = len;
             break;
         case DUMMY_FAIL:
-            return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
+            return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ;
     }
 
     memset( output, 0x2a, *olen );
-    return( 0 );
+    return 0 ;
 }
 
 /*
@@ -71,19 +71,19 @@
 int buffer_nv_seed_read( unsigned char *buf, size_t buf_len )
 {
     if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( -1 );
+        return -1 ;
 
     memcpy( buf, buffer_seed, MBEDTLS_ENTROPY_BLOCK_SIZE );
-    return( 0 );
+    return 0 ;
 }
 
 int buffer_nv_seed_write( unsigned char *buf, size_t buf_len )
 {
     if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( -1 );
+        return -1 ;
 
     memcpy( buffer_seed, buf, MBEDTLS_ENTROPY_BLOCK_SIZE );
-    return( 0 );
+    return 0 ;
 }
 
 /*
@@ -94,18 +94,18 @@
     FILE *f;
 
     if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( -1 );
+        return -1 ;
 
     if( ( f = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w" ) ) == NULL )
-        return( -1 );
+        return -1 ;
 
     if( fwrite( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) !=
                     MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( -1 );
+        return -1 ;
 
     fclose( f );
 
-    return( 0 );
+    return 0 ;
 }
 
 int read_nv_seed( unsigned char *buf, size_t buf_len )
@@ -113,18 +113,18 @@
     FILE *f;
 
     if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( -1 );
+        return -1 ;
 
     if( ( f = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb" ) ) == NULL )
-        return( -1 );
+        return -1 ;
 
     if( fread( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) !=
                     MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( -1 );
+        return -1 ;
 
     fclose( f );
 
-    return( 0 );
+    return 0 ;
 }
 #endif /* MBEDTLS_ENTROPY_NV_SEED */
 /* END_HEADER */