mdInput should trigger MdCompatibilityInvalidPrefixError

[amitport]

Bug, feature request, or proposal:

bug

What is the expected behavior?

with NoConflictStyleCompatibilityMode, using mdInput (instead of matInput) should throw an error

What is the current behavior?

when using mdInput with NoConflictStyleCompatibilityMode no error is thrown

What are the steps to reproduce?

http://plnkr.co/edit/o077B6uEiiIgkC0S06dd?p=info

What is the use-case or motivation for changing an existing behavior?

minor annoyance

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

angular 1.3
material 2.0.0-beta.8

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