ARM: dts: at91: sama5d27_wlsom1: add SAMA5D27 wlsom1 and wlsom1-ek

ARM: dts: at91: sama5d27_wlsom1: add SAMA5D27 wlsom1 and wlsom1-ek

This is the addition of a new Evaluation Kit the SAMA5D27-WLSOM1-EK.
It's based on the Microchip WireLess SoM which contains the
SAMA5D27 LPDDR2 2Gbits SiP.

[nicolas.ferre@microchip.com]: initial implementation
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[eugen.hristev@microchip.com]: ported to new kernel version,
[eugen.hristev@microchip.com]: addition of peripherals (adc, pmic, qspi, uart)
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/1573543139-8533-4-git-send-email-eugen.hristev@microchip.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>