pitx-imx8m: fix fdt filename

Signed-off-by: Thomas Schaefer <thomas.schaefer@kontron.com>

include/configs/pitx-imx8m.h

@@ -165,7 +165,7 @@
 	"fdt_addr=0x43000000\0"			\
 	"fdt_high=0xffffffffffffffff\0"		\
 	"boot_fdt=try\0" \
-	"set_fdtfile=setenv fdtfile kontron-pitx-imx8m.dtb;" "\0" \
+	"set_fdtfile=setenv fdtfile pitx-imx8m_hdmi.dtb;" "\0" \
 	"initrd_addr=0x43800000\0"		\
 	"initrd_high=0xffffffffffffffff\0" \
 	"bootfailed=echo Booting failed from all boot sources && false" "\0" \