spi: imx: drop useless member speed_hz from driver data struct

The driver data's member variable just caches the transfer's speed_hz
member. All users of the former now have access directly to the latter.
So fix them to use the uncached value and remove the cache.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-imx.c

@@ -87,7 +87,6 @@ struct spi_imx_data {
 	unsigned long spi_clk;
 	unsigned int spi_bus_clk;
 
-	unsigned int speed_hz;
 	unsigned int bits_per_word;
 	unsigned int spi_drctl;
 
@@ -562,7 +561,7 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
 				       struct spi_transfer *t)
 {
 	u32 ctrl = readl(spi_imx->base + MX51_ECSPI_CTRL);
-	u32 clk = spi_imx->speed_hz, delay;
+	u32 clk = t->speed_hz, delay;
 
 	/* Clear BL field and set the right value */
 	ctrl &= ~MX51_ECSPI_CTRL_BL_MASK;
@@ -576,7 +575,7 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
 	/* set clock speed */
 	ctrl &= ~(0xf << MX51_ECSPI_CTRL_POSTDIV_OFFSET |
 		  0xf << MX51_ECSPI_CTRL_PREDIV_OFFSET);
-	ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->speed_hz, &clk);
+	ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
 	spi_imx->spi_bus_clk = clk;
 
 	if (spi_imx->usedma)
@@ -694,7 +693,7 @@ static int mx31_prepare_transfer(struct spi_imx_data *spi_imx,
 	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->speed_hz, &clk) <<
+	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, t->speed_hz, &clk) <<
 		MX31_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
@@ -800,7 +799,7 @@ static int mx21_prepare_transfer(struct spi_imx_data *spi_imx,
 	unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, spi_imx->speed_hz, max, &clk)
+	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, t->speed_hz, max, &clk)
 		<< MX21_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
@@ -875,7 +874,7 @@ static int mx1_prepare_transfer(struct spi_imx_data *spi_imx,
 	unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->speed_hz, &clk) <<
+	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, t->speed_hz, &clk) <<
 		MX1_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
@@ -1194,7 +1193,6 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 		return 0;
 
 	spi_imx->bits_per_word = t->bits_per_word;
-	spi_imx->speed_hz = t->speed_hz;
 
 	/*
 	 * Initialize the functions for transfer. To transfer non byte-aligned