accel/amdxdna: Add RyzenAI-npu6 support

Add NPU6 registers and other private configurations.

Co-developed-by: Xiaoming Ren <xiaoming.ren@amd.com>
Signed-off-by: Xiaoming Ren <xiaoming.ren@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241213232933.1545388-2-lizhi.hou@amd.com