imx-base: Add mx7 support to U-Boot, MACHINE filter and DEFAULT_TUNE
Add the mx7 settings for U-boot, MACHINE and DEFAULT_TUNE.
MX7 is a new i.MX SoC Family created with the 3.14.28-7D_alpha release
and upstreamed with the 3.14.38-6QP_beta release.
i.MX 7Dual is a CortexA7 ARM core so requires different DEFAULT_TUNE
however it does build with the cortexa9 but not as optimized as it is with
the cortexa7 toolchain.
Signed-off-by: Lauren Post <lauren.post@freescale.com> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
