add cmake support for samd21.

update ci cmake

hw/bsp/samd21/family.c

@@ -28,6 +28,12 @@
 #include "bsp/board_api.h"
 #include "board.h"
 
+// Suppress warning caused by mcu driver
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-qual"
+#endif
+
 #include "hal/include/hal_gpio.h"
 #include "hal/include/hal_init.h"
 #include "hri/hri_nvmctrl_d21.h"
@@ -36,6 +42,10 @@
 #include "hpl_pm_config.h"
 #include "hpl/pm/hpl_pm_base.h"
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
 //--------------------------------------------------------------------+
 // Forward USB interrupt events to TinyUSB IRQ Handler
 //--------------------------------------------------------------------+