tests: Tweak machine SPI and UART tests to work with esp32c6.

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

tests/extmod/machine_spi_rate.py

@@ -21,7 +21,8 @@ if "pyboard" in sys.platform:
 elif "rp2" in sys.platform:
     spi_instances = ((0, Pin(18), Pin(19), Pin(16)),)
 elif "esp32" in sys.platform:
-    if "ESP32C3" in str(sys.implementation):
+    impl = str(sys.implementation)
+    if "ESP32C3" in impl or "ESP32C6" in impl:
         spi_instances = ((1, Pin(4), Pin(5), Pin(6)),)
     else:
         spi_instances = ((1, Pin(18), Pin(19), Pin(21)), (2, Pin(18), Pin(19), Pin(21)))

tests/extmod_hardware/machine_uart_irq_break.py

@@ -15,7 +15,8 @@ import time, sys
 
 # Configure pins based on the target.
 if "esp32" in sys.platform:
-    if "ESP32S2" in sys.implementation._machine or "ESP32C3" in sys.implementation._machine:
+    _machine = sys.implementation._machine
+    if "ESP32S2" in _machine or "ESP32C3" in _machine or "ESP32C6" in _machine:
         print("SKIP")
         raise SystemExit
     # ESP32 needs separate UART instances for the test