base: Always compile the condition of chatty_assert.
base: Always compile the condition of chatty_assert.

The condition must always be valid code and will always exist to
satisfy the compiler as far as what variables are used, etc, but it
will only actually be evaluated if NDEBUG is not set.

Change-Id: Ia5a6273c95f2e7bf1b7443751fed38c62e73b351
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/48605
Reviewed-by: Daniel Carvalho <91779fc734d358d9575ec4910de29bfcbcaf1b22@yahoo.com.br>
Reviewed-by: Jason Lowe-Power <92de577f37050ad05b60626d2f17913f40dcb1a2@gmail.com>
Maintainer: Daniel Carvalho <91779fc734d358d9575ec4910de29bfcbcaf1b22@yahoo.com.br>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

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