Revert "kdb: Get rid of confusing diag msg from "rd" if current task has no regs"
This reverts commit bbfceba1. When DBG_MAX_REG_NUM is zero then a number of symbols are conditionally defined. It is therefore not possible to check it using C expressions. Reported-by: Anatoly Pugachev <matorola@gmail.com> Acked-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
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