x86: apl: Use struct spi_nor instead of struct spi_flash

This construct effectively uses struct spi_nor due to a #define in
spi-nor.h so we may as well use that struct here. This allows dtoc to
parse it correctly.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/apollolake/spl.c b/arch/x86/cpu/apollolake/spl.c
index 16a2f15..8991d5e 100644
--- a/arch/x86/cpu/apollolake/spl.c
+++ b/arch/x86/cpu/apollolake/spl.c
@@ -97,7 +97,7 @@
 	.id		= UCLASS_SPI_FLASH,
 	.of_match	= apl_flash_ids,
 	.probe		= apl_flash_probe,
-	.priv_auto	= sizeof(struct spi_flash),
+	.priv_auto	= sizeof(struct spi_nor),
 	.ops		= &apl_flash_ops,
 };