Build failure for spi_loopback on atsamr21_xpro

[galak]

https://app.shippable.com/github/zephyrproject-rtos/ci-test/runs/2909/3/tests

-- Configuring done
CMake Error at ../../../../cmake/extensions.cmake:378 (add_library):
  No SOURCES given to target: drivers__dma
Call Stack (most recent call first):
  ../../../../cmake/extensions.cmake:355 (zephyr_library_named)
  ../../../../drivers/dma/CMakeLists.txt:3 (zephyr_library)

[galak]

@benpicco

[benpicco]

That's because #15023 was merged but #14861 was not.

[galak]

That's because #15023 was merged but #14861 was not.

Thanks, just reviewed #14861.

[galak]

Resolved with merge of #14861