mtd: rawnand: intel: Remove unused clk_rate member from struct ebu_nand

The clk_rate member from struct ebu_nand is only written but never read.
Remove this unused and unneeded member.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220702231227.1579176-8-martin.blumenstingl@googlemail.com

drivers/mtd/nand/raw/intel-nand-controller.c

@@ -118,7 +118,6 @@ struct ebu_nand_controller {
 	struct dma_chan *dma_tx;
 	struct dma_chan *dma_rx;
 	struct completion dma_access_complete;
-	unsigned long clk_rate;
 	struct clk *clk;
 	u32 nd_para0;
 	u8 cs_num;
@@ -636,7 +635,6 @@ static int ebu_nand_probe(struct platform_device *pdev)
 		dev_err(dev, "failed to enable clock: %d\n", ret);
 		return ret;
 	}
-	ebu_host->clk_rate = clk_get_rate(ebu_host->clk);
 
 	ebu_host->dma_tx = dma_request_chan(dev, "tx");
 	if (IS_ERR(ebu_host->dma_tx)) {