refactor(st): update test for closed chip

The function stm32mp_is_closed_device() is replaced with
stm32mp_check_closed_device(), which return an uint32_t, either
STM32MP_CHIP_SEC_OPEN or STM32MP_CHIP_SEC_CLOSED.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: Ie0790cdc36c4b6522083bc1f0e7c38e8061e6adf
diff --git a/drivers/st/bsec/bsec2.c b/drivers/st/bsec/bsec2.c
index 463fb30..a6e5220 100644
--- a/drivers/st/bsec/bsec2.c
+++ b/drivers/st/bsec/bsec2.c
@@ -824,7 +824,7 @@
 		result = BSEC_STATE_INVALID;
 	} else {
 		if ((status & BSEC_OTP_STATUS_SECURE) != 0U) {
-			if (stm32mp_is_closed_device()) {
+			if (stm32mp_check_closed_device() == STM32MP_CHIP_SEC_CLOSED) {
 				result = BSEC_STATE_SEC_CLOSED;
 			} else {
 				result = BSEC_STATE_SEC_OPEN;