Add support for generating PAC for dual cores

* Chips that have multiple cores will be exposed as chipname_corename,
  i.e. stm32wl55jc_cm4
* Chips that have single cores will use the chip family as feature name
  and pick the first and only core from the list
* Add support for stm32wl55 chip family

embassy-stm32/gen_features.py

@@ -1,7 +1,13 @@
 import os
 import toml
+import yaml
 from glob import glob
 
+try:
+    from yaml import CSafeLoader as SafeLoader
+except ImportError:
+    from yaml import SafeLoader
+
 abspath = os.path.abspath(__file__)
 dname = os.path.dirname(abspath)
 os.chdir(dname)
@@ -12,6 +18,7 @@ supported_families = [
     'STM32L4',
     'STM32H7',
     'STM32WB55',
+    'STM32WL55',
 ]
 
 # ======= load chip list
@@ -21,7 +28,15 @@ for f in sorted(glob('../stm32-data/data/chips/*.yaml')):
     name = os.path.splitext(os.path.basename(f))[0]
     if any((family in name for family in supported_families)):
         name = name.lower()
-        features[name] = ['stm32-metapac/' + name]
+        # ======= load chip
+        with open(f, 'r') as f:
+            chip = yaml.load(f, Loader=SafeLoader)
+
+        if len(chip['cores']) > 1:
+            for core in chip['cores']:
+                features[name + "_" + core['name']] = ['stm32-metapac/' + name + '_' + core['name']]
+        else:
+            features[name] = ['stm32-metapac/' + name]
 
 # ========= Update Cargo features