[PATCH] board: update test on misc_read result in board_late_init

[Patrick Delaunay]

Update management of misc_read, which now return length of data
after the commit 8729b1ae2cbd ("misc: Update read() and write()
methods to return bytes xfered")

Fixes: 8b8b3d6b55b9 ("stm32mp1: board: add environment variable for board id and board rev")

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 board/st/stm32mp1/stm32mp1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 4553329b25..b51165a636 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -732,7 +732,7 @@ int board_late_init(void)
 	if (!ret)
 		ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_BOARD),
 				&otp, sizeof(otp));
-	if (!ret && otp) {
+	if (ret > 0 && otp) {
 		snprintf(buf, sizeof(buf), "0x%04x", otp >> 16);
 		env_set("board_id", buf);
 
-- 
2.17.1