spidev: Decrease indentation level in spidev_ioctl() SPI_IOC_RD_MODE*

Instead of defining a local controller variable inside an indented
block, move the definition to the top of spidev_ioctl() and reuse
it in the SPI_IOC_RD_MODE* and SPI_IOC_WR_MODE* cases.

This drops unneeded indentation and reduces amount of LoCs.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Link: https://lore.kernel.org/r/20230824162209.2890440-2-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spidev.c

@@ -357,6 +357,7 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	int			retval = 0;
 	struct spidev_data	*spidev;
 	struct spi_device	*spi;
+	struct spi_controller	*ctlr;
 	u32			tmp;
 	unsigned		n_ioc;
 	struct spi_ioc_transfer	*ioc;
@@ -376,6 +377,8 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		return -ESHUTDOWN;
 	}
 
+	ctlr = spi->controller;
+
 	/* use the buffer lock here for triple duty:
 	 *  - prevent I/O (from us) so calling spi_setup() is safe;
 	 *  - prevent concurrent SPI_IOC_WR_* from morphing
@@ -390,13 +393,9 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	case SPI_IOC_RD_MODE32:
 		tmp = spi->mode;
 
-		{
-			struct spi_controller *ctlr = spi->controller;
-
 		if (ctlr->use_gpio_descriptors && ctlr->cs_gpiods &&
 		    ctlr->cs_gpiods[spi_get_chipselect(spi, 0)])
 			tmp &= ~SPI_CS_HIGH;
-		}
 
 		if (cmd == SPI_IOC_RD_MODE)
 			retval = put_user(tmp & SPI_MODE_MASK,
@@ -424,7 +423,6 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		else
 			retval = get_user(tmp, (u32 __user *)arg);
 		if (retval == 0) {
-			struct spi_controller *ctlr = spi->controller;
 			u32	save = spi->mode;
 
 			if (tmp & ~SPI_MODE_MASK) {