Add compatible strings for the I2C IP blocks present on several Tegra
chips.  The primary objective here is to avoid checkpatch warnings,
per:

http://marc.info/?l=linux-tegra&m=142201349727836&w=2

Signed-off-by: Paul Walmsley <p...@pwsan.com>
Cc: Wolfram Sang <w...@the-dreams.de>
Cc: Rob Herring <robh...@kernel.org>
Cc: Pawel Moll <pawel.m...@arm.com>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Ian Campbell <ijc+devicet...@hellion.org.uk>
Cc: Kumar Gala <ga...@codeaurora.org>
Cc: Stephen Warren <swar...@wwwdotorg.org>
Cc: Thierry Reding <thierry.red...@gmail.com>
Cc: Alexandre Courbot <gnu...@gmail.com>
Cc: linux-...@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-te...@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
---
 .../devicetree/bindings/i2c/nvidia,tegra20-i2c.txt |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt 
b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
index 87507e9ce6db..8e233d913a78 100644
--- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
@@ -2,6 +2,9 @@ NVIDIA Tegra20/Tegra30/Tegra114 I2C controller driver.
 
 Required properties:
 - compatible : should be:
+       "nvidia,tegra210-i2c" (not yet matched by the driver)
+       "nvidia,tegra132-i2c" (not yet matched by the driver)
+       "nvidia,tegra124-i2c" (not yet matched by the driver)
        "nvidia,tegra114-i2c"
        "nvidia,tegra30-i2c"
        "nvidia,tegra20-i2c"


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