sti: fix STMicroelectronics copyright

Uniformize all STMicroelectronics copyrights headers for STi
related code.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/mmc/sti_sdhci.c b/drivers/mmc/sti_sdhci.c
index a98c1eb..1c92bb2 100644
--- a/drivers/mmc/sti_sdhci.c
+++ b/drivers/mmc/sti_sdhci.c
@@ -1,8 +1,8 @@
 /*
- *  Copyright (c) 2017
- *  Patrice Chotard <patrice.chotard@st.com>
+ * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+ * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
  *
- * SPDX-License-Identifier:	GPL-2.0
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>