tools/metrics.py: Add rp2 port to table of ports that can be built.

Signed-off-by: Damien George <damien@micropython.org>

tools/metrics.py

@@ -67,6 +67,7 @@ port_data = {
     "8": PortData("esp8266", "esp8266", "build-GENERIC/firmware.elf"),
     "3": PortData("esp32", "esp32", "build-GENERIC/micropython.elf"),
     "r": PortData("nrf", "nrf", "build-pca10040/firmware.elf"),
+    "p": PortData("rp2", "rp2", "build-PICO/firmware.elf"),
     "d": PortData("samd", "samd", "build-ADAFRUIT_ITSYBITSY_M4_EXPRESS/firmware.elf"),
 }