[stm32x] Use modern header include paths.

Replace includes of stm32/YY/xxxx.h with stm32/xxxx.h
Replace stm32/YY/nvic.h with cm3/nvic.h.
In some cases, the include list was resorted alphabetically when it was
complicated and I was reviewing them manually, but most of this was
automatically done.

examples/stm32/f1/stm32vl-discovery/adc-dac-printf/adc-dac-printf.c

@@ -25,8 +25,8 @@
 #include <libopencm3/stm32/dac.h>
 #include <libopencm3/stm32/gpio.h>
 #include <libopencm3/stm32/usart.h>
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/adc.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/adc.h>
 
 #define LED_DISCOVERY_USER_PORT	GPIOC
 #define LED_DISCOVERY_USER_PIN	GPIO8

examples/stm32/f1/stm32vl-discovery/button/button.c

@@ -18,8 +18,8 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
 
 uint16_t exti_line_state;
 

examples/stm32/f1/stm32vl-discovery/fancyblink/fancyblink.c

@@ -19,8 +19,8 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
 
 /* Set STM32 to 24 MHz. */
 static void clock_setup(void)

examples/stm32/f1/stm32vl-discovery/miniblink/miniblink.c

@@ -17,8 +17,8 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
 
 static void gpio_setup(void)
 {

examples/stm32/f1/stm32vl-discovery/rtc/rtc.c

@@ -18,8 +18,8 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
 #include <libopencm3/stm32/rtc.h>
 #include <libopencm3/stm32/usart.h>
 #include <libopencm3/stm32/pwr.h>

examples/stm32/f1/stm32vl-discovery/usart/usart.c

@@ -17,8 +17,8 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
 #include <libopencm3/stm32/usart.h>
 
 static void clock_setup(void)