As the IODelay driver is a hardware feature of the  DRA7xxx SoC
depend on that SoC and compile test.
Signed-off-by: NPeter Robinson <pbrobinson@gmail.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>