[l1] PWR: fix style for common code

Code added for L1 to support the PWR Control block didn't properly
follow the HACKING_COMMON_DOC guidelines.  The naming was wrong, and
some headers were missing.  This commit has no functional changes, it
only addresses the style and structure problems.

lib/stm32/l1/Makefile

@@ -31,7 +31,7 @@ ARFLAGS		= rcs
 OBJS		= rcc.o desig.o crc.o usart.o exti2.o flash.o timer.o
 OBJS +=     gpio_common_all.o gpio_common_f24.o spi_common_all.o crc_common_all.o
 OBJS +=     dac_common_all.o usart_common_all.o iwdg_common_all.o i2c_common_all.o
-OBJS +=     pwr_chipset.o # TODO, get pwr.o to fix f2/f4 first...  pwr.o
+OBJS +=     pwr_common_all.o pwr.o
 
 VPATH += ../../usb:../:../../cm3:../common
 

lib/stm32/l1/pwr.c

@@ -17,7 +17,7 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libopencm3/stm32/l1/pwr.h>
+#include <libopencm3/stm32/pwr.h>
 
 void pwr_set_vos_scale(vos_scale_t scale)
 {

lib/stm32/l1/rcc.c

@@ -23,7 +23,7 @@
 
 #include <libopencm3/stm32/l1/rcc.h>
 #include <libopencm3/stm32/l1/flash.h>
-#include <libopencm3/stm32/l1/pwr.h>
+#include <libopencm3/stm32/pwr.h>
 
 /* Set the default ppre1 and ppre2 peripheral clock frequencies after reset. */
 u32 rcc_ppre1_frequency = 2097000;