bmp180: change method names/signature for obtaining temperature and pressure uniform with other similar drivers

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

examples/bmp180/main.go

@@ -3,8 +3,9 @@ package main
 import (
 	"time"
 
-	"github.com/tinygo-org/drivers/bmp180"
 	"machine"
+
+	"github.com/tinygo-org/drivers/bmp180"
 )
 
 func main() {
@@ -20,10 +21,10 @@ func main() {
 	println("BMP180 detected")
 
 	for {
-		temp, _ := sensor.Temperature()
+		temp, _ := sensor.ReadTemperature()
 		println("Temperature:", float32(temp)/1000, "ºC")
 
-		pressure, _ := sensor.Pressure()
+		pressure, _ := sensor.ReadPressure()
 		println("Pressure", float32(pressure)/100000, "hPa")
 
 		time.Sleep(2 * time.Second)