test: pake: fix error in ssl_ecjpake_set_password()

Signed-off-by: Valerio Setti <vsetti@baylibre.com>
diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index 0530ca0..4f8ef52 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -6206,7 +6206,7 @@
 #else   /* MBEDTLS_USE_PSA_CRYPTO */
     (void) use_opaque_arg;
 #endif  /* MBEDTLS_USE_PSA_CRYPTO */
-    const unsigned char pwd_string[ sizeof(ECJPAKE_TEST_PWD) ] = "";
+    unsigned char pwd_string[ sizeof(ECJPAKE_TEST_PWD) ] = "";
     size_t pwd_len = 0;
     int ret;
 
@@ -6231,7 +6231,7 @@
     ECJPAKE_TEST_SET_PASSWORD( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
 
     pwd_len = strlen( ECJPAKE_TEST_PWD );
-    memcpy( (void*) pwd_string, ECJPAKE_TEST_PWD, pwd_len );
+    memcpy( pwd_string, ECJPAKE_TEST_PWD, pwd_len );
 
 #if defined( MBEDTLS_USE_PSA_CRYPTO )
     if( use_opaque_arg )