ARM: ux500: regulators: Remove misleading comment

This patch removes a comment which explains that the ab8505 platform
uses the same initialisation settings as the ab8500. Well when this
changed and the ab8505 started using its own set of initialisation
values, someone forgot to remove it.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>