stm32: Consolidate include of genhdr/pins.h to single location in pin.h.

genhdr/pins.h is an internal header file that defines all of the pin
objects and it's cleaner to have pin.h include it (where the struct's for
these objects are defined) rather than an explicit include by every user.

ports/stm32/accel.c

@@ -30,7 +30,6 @@
 #include "py/mphal.h"
 #include "py/runtime.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "i2c.h"
 #include "accel.h"
 

ports/stm32/adc.c

@@ -32,7 +32,6 @@
 #include "py/mphal.h"
 #include "adc.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "timer.h"
 
 #if MICROPY_HW_ENABLE_ADC

ports/stm32/boards/STM32L476DISC/bdev.c

@@ -1,5 +1,4 @@
 #include "storage.h"
-#include "genhdr/pins.h"
 
 // External SPI flash uses standard SPI interface
 

ports/stm32/boards/STM32L476DISC/board_init.c

@@ -1,5 +1,4 @@
 #include "py/mphal.h"
-#include "genhdr/pins.h"
 
 void STM32L476DISC_board_early_init(void) {
     // set SPI flash WP and HOLD pins high

ports/stm32/dac.c

@@ -33,7 +33,6 @@
 #include "dac.h"
 #include "dma.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 
 /// \moduleref pyb
 /// \class DAC - digital to analog conversion

ports/stm32/i2c.c

@@ -31,7 +31,6 @@
 #include "py/mphal.h"
 #include "irq.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "bufhelper.h"
 #include "dma.h"
 #include "i2c.h"

ports/stm32/lcd.c

@@ -33,7 +33,6 @@
 #if MICROPY_HW_HAS_LCD
 
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "bufhelper.h"
 #include "spi.h"
 #include "font_petme128_8x8.h"

ports/stm32/led.c

@@ -31,7 +31,6 @@
 #include "timer.h"
 #include "led.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 
 #if defined(MICROPY_HW_LED1)
 

ports/stm32/machine_i2c.c

@@ -31,7 +31,6 @@
 #include "py/mphal.h"
 #include "py/mperrno.h"
 #include "extmod/machine_i2c.h"
-#include "genhdr/pins.h"
 #include "i2c.h"
 
 #if MICROPY_HW_ENABLE_HW_I2C

ports/stm32/modnwcc3k.c

@@ -39,7 +39,6 @@
 #include "lib/netutils/netutils.h"
 #include "modnetwork.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "spi.h"
 
 #include "hci.h"

ports/stm32/modnwwiznet5k.c

@@ -36,7 +36,6 @@
 #include "lib/netutils/netutils.h"
 #include "modnetwork.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "spi.h"
 
 #include "ethernet/wizchip_conf.h"

ports/stm32/pin.h

@@ -63,6 +63,9 @@ typedef struct {
 extern const mp_obj_type_t pin_type;
 extern const mp_obj_type_t pin_af_type;
 
+// Include all of the individual pin objects
+#include "genhdr/pins.h"
+
 typedef struct {
   const char *name;
   const pin_obj_t *pin;

ports/stm32/qspi.c

@@ -28,7 +28,6 @@
 
 #include "py/mperrno.h"
 #include "py/mphal.h"
-#include "genhdr/pins.h"
 #include "qspi.h"
 
 #if defined(MICROPY_HW_QSPIFLASH_SIZE_BITS_LOG2)

ports/stm32/sdcard.c

@@ -33,7 +33,6 @@
 
 #include "sdcard.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "bufhelper.h"
 #include "dma.h"
 #include "irq.h"

ports/stm32/servo.c

@@ -29,7 +29,6 @@
 #include "py/runtime.h"
 #include "py/mphal.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "timer.h"
 #include "servo.h"
 

ports/stm32/spi.c

@@ -32,7 +32,6 @@
 #include "extmod/machine_spi.h"
 #include "irq.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "bufhelper.h"
 #include "spi.h"
 

ports/stm32/uart.c

@@ -34,7 +34,6 @@
 #include "py/mphal.h"
 #include "uart.h"
 #include "irq.h"
-#include "genhdr/pins.h"
 
 /// \moduleref pyb
 /// \class UART - duplex serial communication bus

ports/stm32/usrsw.c

@@ -30,7 +30,6 @@
 #include "py/mphal.h"
 #include "extint.h"
 #include "pin.h"
-#include "genhdr/pins.h"
 #include "usrsw.h"
 
 #if MICROPY_HW_HAS_SWITCH