dts: socfpga: Add Mercury+ AA1 devicetree

Add support for the Mercury+ AA1 module for Arria 10 SoC FPGA.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
Signed-off-by: Joanna Brozek <jbrozek@antmicro.com>
Signed-off-by: Mariusz Glebocki <mglebocki@antmicro.com>
Signed-off-by: Tomasz Gorochowik <tgorochowik@antmicro.com>
Signed-off-by: Maciej Mikunda <mmikunda@antmicro.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211021151736.2096926-2-pan@semihalf.com

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>