Fix check on UVISOR_PRESENT=1 macro

Author: AlessandroA

tools/toolchains/__init__.py

@@ -217,7 +217,7 @@ def __init__(self, target, options=None, notify=None, macros=None, silent=False,
 
         self.mp_pool = None
 
-        if 'UVISOR_PRESENT' in self.macros:
+        if 'UVISOR_PRESENT=1' in self.macros:
             self.target.core = re.sub(r"F$", '', self.target.core)
 
     def get_output(self):