arm64: zynqmp: Add missing description for efuse aeskey/pufuser

Add missing description for efuse aeskey/pufuser offsets.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/9975c501c92d8e9d6e307dfd3f4146e08a2fc68e.1704799551.git.michal.simek@amd.com