refactor: add display.Pin interface and use it everywhere that is easy to do so

Signed-off-by: deadprogram <ron@hybridgroup.com>

pcd8544/pcd8544.go

@@ -6,7 +6,6 @@ package pcd8544 // import "tinygo.org/x/drivers/pcd8544"
 import (
 	"errors"
 	"image/color"
-	"machine"
 	"time"
 
 	"tinygo.org/x/drivers"
@@ -15,9 +14,9 @@ import (
 // Device wraps an SPI connection.
 type Device struct {
 	bus        drivers.SPI
-	dcPin      machine.Pin
-	rstPin     machine.Pin
-	scePin     machine.Pin
+	dcPin      drivers.Pin
+	rstPin     drivers.Pin
+	scePin     drivers.Pin
 	buffer     []byte
 	width      int16
 	height     int16
@@ -29,8 +28,8 @@ type Config struct {
 	Height int16
 }
 
-// New creates a new PCD8544 connection. The SPI bus must already be configured.
-func New(bus drivers.SPI, dcPin, rstPin, scePin machine.Pin) *Device {
+// New creates a new PCD8544 connection. The SPI bus and pins must already be configured.
+func New(bus drivers.SPI, dcPin, rstPin, scePin drivers.Pin) *Device {
 	return &Device{
 		bus:    bus,
 		dcPin:  dcPin,