David Sidrane 6f9a9b3d2c px4_fmu-v4: add runtime external SPI4 detection to support pmw3901 (#11301)
* The build is built with SPI4. At run time the signal GPIO_8266_GPIO2 it tested. If it is low the SPI4 is configured. If it is high SPI4 is not configured.
 * board_common: Add Notion of Board has bus manifest
2019-01-29 13:44:15 -05:00
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