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/pci/pcie_imx.c b/drivers/pci/pcie_imx.c
index cbf1237..ebf9b88 100644
--- a/drivers/pci/pcie_imx.c
+++ b/drivers/pci/pcie_imx.c
@@ -830,7 +830,7 @@
 	.probe			= imx_pcie_dm_probe,
 	.remove			= imx_pcie_dm_remove,
 	.ofdata_to_platdata	= imx_pcie_ofdata_to_platdata,
-	.priv_auto_alloc_size	= sizeof(struct imx_pcie_priv),
+	.priv_auto	= sizeof(struct imx_pcie_priv),
 	.flags			= DM_FLAG_OS_PREPARE,
 };
 #endif