i2c: omap: adopt pinctrl support
Some GPIO expanders need some early pin control muxing. Due to legacy boards sometimes the driver uses subsys_initcall instead of module_init. This patch takes advantage of defer probe feature and pin control in order to wait until pin control probing before GPIO driver probing. It has been tested on OMAP5 board with TCA6424 driver. Signed-off-by: NSebastien Guiriec <s-guiriec@ti.com> Acked-by: NShubhrajyoti D <shubhrajyoti@ti.com> Reviewed-by: NFelipe Balbi <balbi@ti.com> Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
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