meson.bbclass: Handle microblaze* mapping to cpu family

(From OE-Core rev: 01692856b8294109ac553c5c0cc23dbb5f1a8970)

Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/meson.bbclass

@@ -55,6 +55,8 @@ def meson_cpu_family(var, d):
         return 'mips64'
     elif re.match(r"i[3-6]86", arch):
         return "x86"
+    elif arch == "microblazeel" or arch == "microblazeeb":
+        return "microblaze"
     else:
         return arch