spi: spi: Remove unnecessary ‘0’ values from rc

rc is assigned first, so it does not need to initialize the assignment.
Signed-off-by: Li zeming <zeming@nfschina.com>
Link: https://patch.msgid.link/20240708035320.14241-1-zeming@nfschina.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi.c

@@ -2570,7 +2570,7 @@ struct spi_device *spi_new_ancillary_device(struct spi_device *spi,
 {
 	struct spi_controller *ctlr = spi->controller;
 	struct spi_device *ancillary;
-	int rc = 0;
+	int rc;
 
 	/* Alloc an spi_device */
 	ancillary = spi_alloc_device(ctlr);