pico-imx7d: Adjust the dtb name

Since kernel commit 41bbeadceb03 ("ARM: dts: imx7d-pico-pi: Separate
into cpu and baseboard dts") the dtb name has changed.

Fix it accordingly.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
diff --git a/include/configs/pico-imx7d.h b/include/configs/pico-imx7d.h
index b208d7f..d2ffa70 100644
--- a/include/configs/pico-imx7d.h
+++ b/include/configs/pico-imx7d.h
@@ -41,7 +41,7 @@
 	"console=ttymxc4\0" \
 	"fdt_high=0xffffffff\0" \
 	"initrd_high=0xffffffff\0" \
-	"fdt_file=imx7d-pico.dtb\0" \
+	"fdt_file=imx7d-pico-pi.dtb\0" \
 	"fdt_addr=0x83000000\0" \
 	"ip_dyn=yes\0" \
 	"mmcdev="__stringify(CONFIG_SYS_MMC_ENV_DEV)"\0" \