dma: tegra: make tegra_dma.chip_data a pointer to const data

This prepares *of_device_id.data becoming const. Without this change
the following warning would occur:

	drivers/dma/tegra20-apb-dma.c: In function 'tegra_dma_probe':
	drivers/dma/tegra20-apb-dma.c:1210:9: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]

[ukl: split Laxman's patch to prevent warnings in the middle of the
series. Original patch was sent with msgid
1346217447-19730-1-git-send-email-ldewangan@nvidia.com]

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index d52dbc6c54ab..29a39b88cdfd 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -201,7 +201,7 @@ struct tegra_dma {
         struct clk                      *dma_clk;
         spinlock_t                      global_lock;
         void __iomem                    *base_addr;
-        struct tegra_dma_chip_data      *chip_data;
+        const struct tegra_dma_chip_data *chip_data;
 
         /* Some register need to be cache before suspend */
         u32                             reg_gen;
@@ -1197,7 +1197,7 @@ static int __devinit tegra_dma_probe(struct platform_device *pdev)
         struct tegra_dma *tdma;
         int ret;
         int i;
-        struct tegra_dma_chip_data *cdata = NULL;
+        const struct tegra_dma_chip_data *cdata = NULL;
 
         if (pdev->dev.of_node) {
                 const struct of_device_id *match;