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/include/spi.h b/include/spi.h
index ef8c1f6..f69c08d 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -102,7 +102,7 @@
  *
  * For driver model this is the per-child data used by the SPI bus. It can
  * be accessed using dev_get_parent_priv() on the slave device. The SPI uclass
- * sets uip per_child_auto_alloc_size to sizeof(struct spi_slave), and the
+ * sets up per_child_auto to sizeof(struct spi_slave), and the
  * driver should not override it. Two platform data fields (max_hz and mode)
  * are copied into this structure to provide an initial value. This allows
  * them to be changed, since we should never change platform data in drivers.