arm64: zynqmp: Fix gpio-key DT description

All gpio-key descriptionos with dt-schema.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/a67884f4fad98b94198123eef45ffdad511b0dc6.1709887234.git.michal.simek@amd.com
7 files changed