spi: spi-cadence-quadspi: Revert "Fix division by zero warning"

Revert to change to a better code.

This reverts commit 55cef88.

Signed-off-by: Yoshitaka Ikeda <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: yoikeda

drivers/spi/spi-cadence-quadspi.c

@@ -307,13 +307,11 @@ static unsigned int cqspi_calc_rdreg(struct cqspi_flash_pdata *f_pdata)
 
 static unsigned int cqspi_calc_dummy(const struct spi_mem_op *op, bool dtr)
 {
-	unsigned int dummy_clk = 0;
+	unsigned int dummy_clk;
 
-	if (op->dummy.buswidth && op->dummy.nbytes) {
-		dummy_clk = op->dummy.nbytes * (8 / op->dummy.buswidth);
-		if (dtr)
-			dummy_clk /= 2;
-	}
+	dummy_clk = op->dummy.nbytes * (8 / op->dummy.buswidth);
+	if (dtr)
+		dummy_clk /= 2;
 
 	return dummy_clk;
 }