stm32f7: enable fsmc

This uses the existing f4 code as a new shared common base code.

include/libopencm3/stm32/f7/fmc.h

@@ -0,0 +1,38 @@
+/** @defgroup fmc_defines FMC Defines
+ * @brief <b>Defined Constants and Types for the STM32F7xx Flexible Memory
+ * Controller</b>
+ * @ingroup STM32F7xx_defines
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/**@{*/
+
+#ifndef LIBOPENCM3_F7_FMC_H
+#define LIBOPENCM3_F7_FMC_H
+
+#ifndef LIBOPENCM3_FSMC_H
+#error "This file should not be included directly, it is included with fsmc.h"
+#endif
+
+#include <libopencm3/stm32/common/fmc_common_f47.h>
+
+/* --- Convenience macros -------------------------------------------------- */
+#define FSMC_BASE				FMCC_BASE
+
+#endif
+
+/**@}*/