pinctrl: ti: The IODelay driver is a DRA7xxx feature so depend on that SoC

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>

drivers/pinctrl/ti/Kconfig

 config PINCTRL_TI_IODELAY
 	tristate "TI IODelay Module pinconf driver"
-	depends on OF
+	depends on OF && (SOC_DRA7XX || COMPILE_TEST)
 	select GENERIC_PINCTRL_GROUPS
 	select GENERIC_PINMUX_FUNCTIONS
 	select GENERIC_PINCONF