Handle Cortex-M33E no-fpu flags

Add compilation "-mfpu=none" flag for Cortex-M33E.

Author: Alexander Zilberkant

tools/toolchains/arm.py

@@ -554,7 +554,7 @@ def __init__(self, target, *args, **kwargs):
         self.SHEBANG += " -mcpu=%s" % cpu
 
         # FPU handling
-        if core == "Cortex-M4" or core == "Cortex-M7" or core == "Cortex-M33":
+        if core in ["Cortex-M4", "Cortex-M7", "Cortex-M33", "Cortex-M33E"]:
             self.flags['common'].append("-mfpu=none")
         elif core == "Cortex-M4F":
             self.flags['common'].append("-mfpu=fpv4-sp-d16")