intel_edison_fab_c.c: added spi_lsbmode_replace to return proper status
intel_edison_fab_c.c: added spi_lsbmode_replace to return proper status

Edison SPI driver doesn't support LSB_FIRST mode, we will now return
_FEATURE_NOT_SUPPORTED instead of _INVALID_RESOURCE
for attempts to enable it.

Closes #22.

Signed-off-by: Alex Tereschenko <c1573d8a2714f7b294fae3af1bb5e489479ca966@gmail.com>
Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

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