From 170680abd1eb98a9773ed068435fef9a6402a10f Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Fri, 12 Dec 2014 11:22:11 +0100
Subject: [PATCH] gpio: mcp23s08: fix up compilation error

The driver depends on the chip.of_node being present to compile,
which is the case on some target platforms but not others.
Instead, rely on chip.dev->of_node to be used, as struct device
always has an of_node in place.

Cc: Alexander Stein <alexander.stein@systec-electronic.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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