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/mmc/pxa_mmc_gen.c b/drivers/mmc/pxa_mmc_gen.c
index 2c081fd..8be9ed6 100644
--- a/drivers/mmc/pxa_mmc_gen.c
+++ b/drivers/mmc/pxa_mmc_gen.c
@@ -530,7 +530,7 @@
 	.id	= UCLASS_MMC,
 	.name	= "pxa_mmc",
 	.ops	= &pxa_mmc_ops,
-	.priv_auto_alloc_size = sizeof(struct pxa_mmc_priv),
+	.priv_auto	= sizeof(struct pxa_mmc_priv),
 	.probe	= pxa_mmc_probe,
 };
 #endif /* !CONFIG_IS_ENABLED(DM_MMC) */