[hal, wpilib] Update Addressable LED support (#8100)

wpilibcExamples/src/main/cpp/examples/AddressableLED/cpp/Robot.cpp

@@ -6,10 +6,8 @@
 
 Robot::Robot() {
   // Default to a length of 60, start empty output
-  // Length is expensive to set, so only set it once, then just update data
   m_led.SetLength(kLength);
   m_led.SetData(m_ledBuffer);
-  m_led.Start();
 }
 
 void Robot::RobotPeriodic() {

wpilibcExamples/src/main/cpp/examples/AddressableLED/include/Robot.h

@@ -18,9 +18,8 @@ class Robot : public frc::TimedRobot {
  private:
   static constexpr int kLength = 60;
 
-  // PWM port 9
-  // Must be a PWM header, not MXP or DIO
-  frc::AddressableLED m_led{9};
+  // SmartIO port 1
+  frc::AddressableLED m_led{1};
   std::array<frc::AddressableLED::LEDData, kLength>
       m_ledBuffer;  // Reuse the buffer