stm32f0: sort makefile object list

Consistent approach, easier to find what you need, easier to merge

lib/stm32/f0/Makefile

@@ -34,22 +34,25 @@ TGT_CFLAGS	+= $(STANDARD_FLAGS)
 
 ARFLAGS		= rcs
 
-OBJS		= can.o flash.o rcc.o comparator.o \
-                  adc.o desig.o
-
-OBJS            += gpio_common_all.o gpio_common_f0234.o crc_common_all.o crc_v2.o \
-                   pwr_common_v1.o iwdg_common_all.o rtc_common_l1f024.o \
-                   dma_common_l1f013.o dma_common_csel.o \
-                   exti_common_all.o \
-                   dac_common_all.o \
-                   timer_common_all.o timer_common_f0234.o rcc_common_all.o
-
-OBJS		+= adc_common_v2.o
+OBJS += adc.o adc_common_v2.o
+OBJS += can.o
+OBJS += comparator.o
+OBJS += crc_common_all.o crc_v2.o
 OBJS += crs_common_all.o
-OBJS		+= flash_common_all.o flash_common_f.o flash_common_f01.o
-OBJS		+= usart_common_all.o usart_common_v2.o
+OBJS += dac_common_all.o
+OBJS += desig.o
+OBJS += dma_common_l1f013.o dma_common_csel.o
+OBJS += exti_common_all.o
+OBJS += flash.o flash_common_all.o flash_common_f.o flash_common_f01.o
+OBJS += gpio_common_all.o gpio_common_f0234.o
+OBJS += iwdg_common_all.o
 OBJS += i2c_common_v2.o
+OBJS += pwr_common_v1.o
+OBJS += rcc.o rcc_common_all.o
+OBJS += rtc_common_l1f024.o
 OBJS += spi_common_all.o spi_common_v2.o
+OBJS += timer_common_all.o timer_common_f0234.o
+OBJS += usart_common_all.o usart_common_v2.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += st_usbfs_core.o st_usbfs_v2.o