arm64: zynqmp: Enable iio-hwmon description only for SOM

Description is coming from SOM only that's why enable it only on SOM.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/08ee4ce2fe242905dd99cea2b87373b57d8fea91.1736152939.git.michal.simek@amd.com
2 files changed