docs: Add documentation of Arm 'kzm' board

Add brief documentation of the Arm 'kzm' board.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210722175229.29065-3-peter.maydell@linaro.org

MAINTAINERS

@@ -694,6 +694,7 @@ F: hw/*/imx_*
 F: hw/*/*imx31*
 F: include/hw/*/imx_*
 F: include/hw/*/*imx31*
+F: docs/system/arm/kzm.rst
 
 Integrator CP
 M: Peter Maydell <peter.maydell@linaro.org>

docs/system/arm/kzm.rst

+Kyoto Microcomputer KZM-ARM11-01 (``kzm``)
+==========================================
+
+The ``kzm`` board emulates the Kyoto Microcomputer KZM-ARM11-01
+evaluation board, which is based on an NXP i.MX32 SoC
+which uses an ARM1136 CPU.
+
+Emulated devices:
+
+- UARTs
+- LAN9118 ethernet
+- AVIC
+- CCM
+- GPT
+- EPIT timers
+- I2C
+- GPIO controllers
+- Watchdog timer

docs/system/target-arm.rst

@@ -91,6 +91,7 @@ undocumented; you can get a complete list by running
    arm/musicpal
    arm/gumstix
    arm/mainstone
+   arm/kzm
    arm/nrf
    arm/nseries
    arm/nuvoton