From 7850cdfc8028cc7d522c032f64c62c1c01e85875 Mon Sep 17 00:00:00 2001
From: Qipan Li <Qipan.Li@csr.com>
Date: Tue, 2 Sep 2014 17:01:01 +0800
Subject: [PATCH] spi: sirf: correct spi gpio and hardware chipselect behaviour

the old codes check the cs-gpios, if the gpio number is 0 like:
<&gpio, 0, 0>, the driver will use the only hardware chipselect.

this is wrong because of_spi_register_master() can read property
cs-gpios from device node and set the spi master's cs number and
gpio cs automatically based on whether the cs-gpios is valid.

this patch fixes the beviour of CSR spi driver and move to a core
level supported way.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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