dm: ofnode: use fdt32_t for DT property value to fix sparse warning

DTB is encoded in big endian.  When we retrieve property values,
we need to use fdt32_to_cpu (aka be32_to_cpu) for endian conversion.
This is a bit error-prone, but sparse is useful to detect endian
mismatch.

We need to use (fdt32_t *) instead of (u32 *) for a pointer of a
property value.  Otherwise sparse warns "cast to restricted __be32".

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/core/ofnode.c

@@ -23,7 +23,7 @@ int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
 	if (ofnode_is_np(node)) {
 		return of_read_u32(ofnode_to_np(node), propname, outp);
 	} else {
-		const int *cell;
+		const fdt32_t *cell;
 		int len;
 
 		cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
@@ -487,7 +487,7 @@ const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 			 const char *propname, struct fdt_pci_addr *addr)
 {
-	const u32 *cell;
+	const fdt32_t *cell;
 	int len;
 	int ret = -ENOENT;