ARM: ux500: Add placeholder for clk_set_parent

Calling clk_set_parent (e.g. from Ux500 ASoC-driver) generates
build-errors.

Signed-off-by: Ola Lilja <ola.o.lilja@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 files changed