dm: treewide: Rename auto_alloc_size members to be shorter

This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.

Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mtd/spi/sandbox.c b/drivers/mtd/spi/sandbox.c
index 1d0c1cb..f52295a 100644
--- a/drivers/mtd/spi/sandbox.c
+++ b/drivers/mtd/spi/sandbox.c
@@ -600,7 +600,7 @@
 	.ofdata_to_platdata = sandbox_sf_ofdata_to_platdata,
 	.probe		= sandbox_sf_probe,
 	.remove		= sandbox_sf_remove,
-	.priv_auto_alloc_size = sizeof(struct sandbox_spi_flash),
-	.platdata_auto_alloc_size = sizeof(struct sandbox_spi_flash_plat_data),
+	.priv_auto	= sizeof(struct sandbox_spi_flash),
+	.platdata_auto	= sizeof(struct sandbox_spi_flash_plat_data),
 	.ops		= &sandbox_sf_emul_ops,
 };