msc_sm2s_imx8mp: Fix CONFIG_DEFAULT_FDT_FILE

There is no imx8mp-msc-sm2s.dtb file in upstream Linux.

Change it to imx8mp-msc-sm2s-ep1.dtb.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Ian Ray <ian.ray@gehealthcare.com>

configs/msc_sm2s_imx8mp_defconfig

@@ -28,7 +28,7 @@ CONFIG_SPL_LOAD_FIT=y
 CONFIG_SYS_BOOTM_LEN=0x2000000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_OF_SYSTEM_SETUP=y
-CONFIG_DEFAULT_FDT_FILE="imx8mp-msc-sm2s.dtb"
+CONFIG_DEFAULT_FDT_FILE="imx8mp-msc-sm2s-ep1.dtb"
 CONFIG_SYS_CBSIZE=2048
 CONFIG_SYS_PBSIZE=2074
 CONFIG_SPL_MAX_SIZE=0x26000