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/include/psa/crypto_struct.h b/include/psa/crypto_struct.h
index 381abf9..ae732c3 100644
--- a/include/psa/crypto_struct.h
+++ b/include/psa/crypto_struct.h
@@ -93,7 +93,7 @@
 static inline struct psa_hash_operation_s psa_hash_operation_init( void )
 {
     const struct psa_hash_operation_s v = PSA_HASH_OPERATION_INIT;
-    return( v );
+    return v ;
 }
 
 struct psa_cipher_operation_s
@@ -118,7 +118,7 @@
 static inline struct psa_cipher_operation_s psa_cipher_operation_init( void )
 {
     const struct psa_cipher_operation_s v = PSA_CIPHER_OPERATION_INIT;
-    return( v );
+    return v ;
 }
 
 /* Include the context definition for the compiled-in drivers for the composite
@@ -143,7 +143,7 @@
 static inline struct psa_mac_operation_s psa_mac_operation_init( void )
 {
     const struct psa_mac_operation_s v = PSA_MAC_OPERATION_INIT;
-    return( v );
+    return v ;
 }
 
 struct psa_aead_operation_s
@@ -164,7 +164,7 @@
 static inline struct psa_aead_operation_s psa_aead_operation_init( void )
 {
     const struct psa_aead_operation_s v = PSA_AEAD_OPERATION_INIT;
-    return( v );
+    return v ;
 }
 
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF)
@@ -251,7 +251,7 @@
         void )
 {
     const struct psa_key_derivation_s v = PSA_KEY_DERIVATION_OPERATION_INIT;
-    return( v );
+    return v ;
 }
 
 struct psa_key_policy_s
@@ -266,7 +266,7 @@
 static inline struct psa_key_policy_s psa_key_policy_init( void )
 {
     const struct psa_key_policy_s v = PSA_KEY_POLICY_INIT;
-    return( v );
+    return v ;
 }
 
 /* The type used internally for key sizes.
@@ -339,7 +339,7 @@
 static inline struct psa_key_attributes_s psa_key_attributes_init( void )
 {
     const struct psa_key_attributes_s v = PSA_KEY_ATTRIBUTES_INIT;
-    return( v );
+    return v ;
 }
 
 static inline void psa_set_key_id( psa_key_attributes_t *attributes,