stm32/irqs: Adapt generators to support WL

Co-authored-by: Alexandre Abadie <alexandre.abadie@inria.fr>

cpu/stm32/dist/irqs/gen_irqs.py

@@ -86,7 +86,8 @@ def irq_numof(cpu_fam, cpu_line):
         ):
             continue
         # Stop at the end of the IRQn_Type enum definition
-        if "IRQn_Type" in line:
+        if "IRQn_Type" in line \
+                and "#else" not in cmsis_content[line_idx + 1].decode():
             break
 
     # Ensure we are on a valid line, otherwise search in earlier lines

cpu/stm32/dist/irqs/gen_vectors.py

@@ -75,6 +75,7 @@ def parse_cmsis(cpu_line):
             continue
         # start filling lines after interrupt Doxygen comment
         if "typedef enum" in line:
+            irq_lines = []  # Cleanup any previous content
             use_line = True
 
         # use a regexp to get the available IRQs