hardware/cpu: add virtualized? check

Signed-off-by: Patrick Linnane <patrick@linnane.io>

Library/Homebrew/extend/os/mac/hardware/cpu.rb

@@ -89,6 +89,10 @@ module Hardware
         sysctl_bool("hw.optional.arm64")
       end
 
+      def virtualized?
+        sysctl_bool("kern.hv_vmm_present")
+      end
+
       private
 
       def arm_family

Library/Homebrew/hardware.rb

@@ -156,6 +156,10 @@ module Hardware
         [1].pack("I") == [1].pack("N")
       end
 
+      def virtualized?
+        false
+      end
+
       def features
         []
       end