MAINTAINERS: add entry for AXI SPI Engine

The AXI SPI Engine driver has been in the kernel for many years but has
lacked a proper maintainers entry. This adds a new entry for the driver
and the devicetree bindings.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20231117-axi-spi-engine-series-1-v1-2-cc59db999b87@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -3415,6 +3415,16 @@ W:	https://ez.analog.com/linux-software-drivers
 F:	Documentation/devicetree/bindings/hwmon/adi,axi-fan-control.yaml
 F:	drivers/hwmon/axi-fan-control.c
 
+AXI SPI ENGINE
+M:	Michael Hennerich <michael.hennerich@analog.com>
+M:	Nuno Sá <nuno.sa@analog.com>
+R:	David Lechner <dlechner@baylibre.com>
+L:	linux-spi@vger.kernel.org
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
+F:	drivers/spi/spi-axi-spi-engine.c
+
 AXXIA I2C CONTROLLER
 M:	Krzysztof Adamski <krzysztof.adamski@nokia.com>
 L:	linux-i2c@vger.kernel.org