board: stm32mp2: Fix SPINAND_NOR_PATH for STM32MP21x

Fix fwu-mdata path for STM32MP21x.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Change-Id: I31c4d5b77902d94322a85a2eba0863ef0f629b32
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/u-boot/+/441192
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>

Author: Patrice Chotard

board/st/stm32mp2/stm32mp2.c

@@ -804,7 +804,7 @@ void *env_sf_get_env_addr(void)
 #if defined(CONFIG_OF_BOARD_FIXUP)
 
 #if defined(CONFIG_STM32MP21X)
-#define SPINAND_NOR_PATH "/soc@0/spi@40430000/flash@0"
+#define SPINAND_NOR_PATH "/soc@0/bus@42080000/spi@40430000/flash@0"
 #else
 #define SPINAND_NOR_PATH "/soc@0/ommanager@40500000/spi@40430000/flash@0"
 #endif