altos/stm: move spi execution to common ao_spi_run
authorKeith Packard <keithp@keithp.com>
Tue, 28 Jun 2016 06:25:01 +0000 (23:25 -0700)
committerKeith Packard <keithp@keithp.com>
Thu, 30 Jun 2016 02:17:45 +0000 (19:17 -0700)
This regularizes SPI hardware use and ensures that the device is
turned off after it has been used and that the status register is back
to 'normal' the next time through.

Signed-off-by: Keith Packard <keithp@keithp.com>

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