PlutoSDR: Prepare for v0.27 release

Submodule linux 40c2158..f457f60:
  > iio: adc: ad9361: Avoid clobbering MGC set gain when switching gain tables
  > staging: iio: ad5933: switch buffer mode to software
  > ad9361: ad9361_dig_interface_timing_analysis(): Properly setup and cleanup
  > iio: ad9361: Highlight selected delay in interface tuning diagnostics
  > iio: ad9361: Rework digital tune function for readability and correctness
  > iio: ad9361: Consolidate PN checker status checks
  > iio: ad9361: Add a helper function to get the number of PHY channels
  > iio: ad9361: Reduce number of ALERT<->FDD transitions during interface tuning
  > iio: ad9361: Make sure to go to ALERT state when feedback clock changes
  > iio: ad9361: Fix tuning diagnostics output
  > iio: adc: ad9361: Return ERROR code when writing manual gain in AGC modes
  > iio: adc: ad9361: Fix erroneous clearing of the TO_ALERT bit
  > dts: zynqmp-zcu102-revB-ad9361-fmcomms*.dts: Fix/update clock usage
  > Merge branch '2017_R1' into xcomm_zynq
  > iio: frequency: adf5355: Fix ADF4355 AUX RF OUTPUT POWER setting
  > Merge pull request #29 from analogdevicesinc/ad9680_minor_fixes

Submodule buildroot c9924ef..72f3cd7:
  > package: libad9361-iio: Add AD9361 library
  > package: libiio: Bump to Version 0.14
  > configs/zynq_[pluto|m2k]_defconfig: use compiler searched in $PATH
  > M2k: Implement mechanism to store and retrieve calibration data
  > board/pluto/update.sh: MTD layout allow 64k and 4k erase blocks
  > board/m2k/msd/img/index_fr|es.html: Fix download link
  > board/m2k/msd/index.html: Fix English and German HTML landing pages

Submodule hdl ba24909..bf3ba44:
  > fmcomms11: Update the SPI IO definitions
  > fmcomms11: Update the clock tree
  > fmcomms11: Delete trailing whitespaces
  > axi_dmac: Include TLAST in AXIS slave port
  > axi_dmac: Add limited TLAST support for streaming AXI source interface
  > axi_ad9361: xilinx LVDS interface: Restore previous feedback clock polarity
  > ad9434: Specified DEVICE_TYPE parameter options
  > axi_ad9434.v Add description for parameter
  > axi_ad9434: Fix bad parameter definition
  > adrv9371: Increase FCLK2 to 200MHz to support max sampling rates
  > avl_dacfifo: Fix avl_address generation
  > avl_dacfifo: Control the avl_burstcount inside the FSM
  > avl_dacfifo: Fix the last address buffer control
  > avl_dacfifo: dma_last_beats is transfered to avalon clock domain, without conditioning
  > daq2: Data underflow of DAC FIFO is monitored by the device core
  > avl_dacfifo: End of burst is not always end of a transaction


Signed-off-by: Michael Hennerich <[email protected]>