meta-phytec

IMX7SW-417: fsl: conf: machine: remove interfering SDMA package dependency

The sources directory includes two imx-base.inc files, meta-freescale/conf/
\machine/include/imx-base.inc and meta-fsl-bsp-release/imx/meta-bsp/conf/
\machine/include/imx-base.inc. Since Bitbake uses the former include file,
remove the "linux-firmware-imx-sdma-imx7d" package from the MACHINE_FIRMWARE
variable, as this package name doesn't exist in the build environment.

Signed-off-by: Jamie Santos <jsantos@phytec.com>