Move STM32F1 DMA files to respective common directories

This sets the stage for adding DMA to STM32F3xx (when added) and STM32L1xx as the controller appears to be identical in these.

lib/stm32/f1/Makefile

@@ -24,7 +24,7 @@ PREFIX		?= arm-none-eabi
 CC		= $(PREFIX)-gcc
 AR		= $(PREFIX)-ar
 CFLAGS		= -Os -g -Wall -Wextra -I../../../include -fno-common \
-		  -mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
+		  -mcpu=cortex-m3 -msoft-float -mthumb -Wstrict-prototypes \
 		  -ffunction-sections -fdata-sections -MD -DSTM32F1
 # ARFLAGS	= rcsv
 ARFLAGS		= rcs
@@ -33,7 +33,7 @@ OBJS		= rcc.o gpio.o usart.o adc.o spi.o flash.o \
 		  usb_f103.o usb.o usb_control.o usb_standard.o can.o \
 		  timer.o usb_f107.o desig.o crc.o dac.o iwdg.o pwr.o \
 		  usb_fx07_common.o \
-		  gpio_common_all.o
+		  gpio_common_all.o dma_common_f13.o
 
 VPATH += ../../usb:../:../../cm3:../common