nvmem: qfprom: Improve the comment about regulator setting

nvmem: qfprom: Improve the comment about regulator setting

In review feedback Joe Perches found the existing comment
confusing. Let's use something based on the wording proposed by Joe.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210611083348.20170-10-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>