SELinux PIO: Give PeripheralMan access to /dev/spidev*

Add a new device type: spi_device for spidev devices
and give pio access to it.

BUG: 27434823
Change-Id: I9a9d3018b6317f621facc24639c8fdf5322a663b
TEST: PIO could open /dev/spidev5.1 on Edison
3 files changed