bootstd: cros: Correct condition for read method

This has a typo which makes the method inoperable. Correct it so that
'bootflow read' works correctly for ChromeOS.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/boot/bootmeth_cros.c b/boot/bootmeth_cros.c
index 20e0b1e..cd72db8 100644
--- a/boot/bootmeth_cros.c
+++ b/boot/bootmeth_cros.c
@@ -406,7 +406,7 @@
 	return -ENOSYS;
 }
 
-#if CONFIG_IS_ENABLED(BOOSTD_FULL)
+#if CONFIG_IS_ENABLED(BOOTSTD_FULL)
 static int cros_read_all(struct udevice *dev, struct bootflow *bflow)
 {
 	int ret;
@@ -419,7 +419,7 @@
 
 	return 0;
 }
-#endif /* BOOSTD_FULL */
+#endif /* BOOTSTD_FULL */
 
 static int cros_boot(struct udevice *dev, struct bootflow *bflow)
 {
@@ -458,9 +458,9 @@
 	.read_bootflow	= cros_read_bootflow,
 	.read_file	= cros_read_file,
 	.boot		= cros_boot,
-#if CONFIG_IS_ENABLED(BOOSTD_FULL)
+#if CONFIG_IS_ENABLED(BOOTSTD_FULL)
 	.read_all	= cros_read_all,
-#endif /* BOOSTD_FULL */
+#endif /* BOOTSTD_FULL */
 };
 
 static const struct udevice_id cros_bootmeth_ids[] = {