mldev: fix Arm build with NEON and GCC 4.8.5

Since bfloat16 intrinsics are not supported on all ARM platforms
that support NEON, bfloat16 routines are moved to separate files.
This would enable usin

mldev: fix Arm build with NEON and GCC 4.8.5

Since bfloat16 intrinsics are not supported on all ARM platforms
that support NEON, bfloat16 routines are moved to separate files.
This would enable using scalar implementation for bfloat16 on
unsupported ARM platforms.

Bugzilla ID: 1179
Fixes: fc54766b1612 ("mldev: add Arm NEON type conversion")

Signed-off-by: Srikanth Yalavarthi <syalavarthi@marvell.com>
Acked-by: Ruifeng Wang <ruifeng.wang@arm.com>

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