stm32f7: include common dma code

Originally reported at https://github.com/libopencm3/libopencm3/pull/978

include/libopencm3/stm32/dma.h

@@ -30,6 +30,8 @@
 #       include <libopencm3/stm32/f3/dma.h>
 #elif defined(STM32F4)
 #       include <libopencm3/stm32/f4/dma.h>
+#elif defined(STM32F7)
+#       include <libopencm3/stm32/f7/dma.h>
 #elif defined(STM32L0)
 #       include <libopencm3/stm32/l0/dma.h>
 #elif defined(STM32L1)

include/libopencm3/stm32/f7/dma.h

@@ -0,0 +1,34 @@
+/** @defgroup dma_defines DMA Defines
+
+@ingroup STM32F7xx_defines
+
+@brief Defined Constants and Types for the STM32F7xx DMA Controller
+
+@version 1.0.0
+
+LGPL License Terms @ref lgpl_license
+ */
+
+/*
+ * 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_DMA_H
+#define LIBOPENCM3_DMA_H
+
+#include <libopencm3/stm32/common/dma_common_f24.h>
+
+#endif

lib/stm32/f7/Makefile

@@ -42,8 +42,9 @@ TGT_CFLAGS	+= $(STANDARD_FLAGS)
 
 ARFLAGS		= rcs
 
-OBJS		= flash_common_all.o flash_common_f.o flash_common_f24.o flash.o
-OBJS		+= desig.o
+OBJS		= desig.o
+OBJS		+= dma_common_f24.o
+OBJS		+= flash_common_all.o flash_common_f.o flash_common_f24.o flash.o
 OBJS		+= gpio.o gpio_common_all.o gpio_common_f0234.o
 OBJS		+= pwr.o rcc.o