spi/qspi: Fix runtime resume path

Due to the following commit
commit 160a0613
Author: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date:   Mon Nov 11 14:13:41 2013 +0800

    spi/qspi: set correct platform drvdata in ti_qspi_probe()

    The ti_qspi_remove() use the platform drvdata as a type of
    struct ti_qspi, we should pass correct platform drvdata to
    platform_set_drvdata() in ti_qspi_probe().
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@linaro.org>

platform_set_drvdata was changed in  the probe, so we need to
correspondingly change deferencing of qspi in runtime resume
path. Else, this will lead to a NULL dereference pointer.

Based on v3.13-rc3
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-ti-qspi.c

@@ -417,10 +417,8 @@ static irqreturn_t ti_qspi_isr(int irq, void *dev_id)
 static int ti_qspi_runtime_resume(struct device *dev)
 {
 	struct ti_qspi      *qspi;
-	struct spi_master       *master;
 
-	master = dev_get_drvdata(dev);
-	qspi = spi_master_get_devdata(master);
+	qspi = dev_get_drvdata(dev);
 	ti_qspi_restore_ctx(qspi);
 
 	return 0;