accel/amdxdna: Fix incorrect error code returned for failed chain command

accel/amdxdna: Fix incorrect error code returned for failed chain command

The driver currently returns an incorrect error code when a chain command
fails. In this case, ERT_CMD_STATE_ERROR is expected to be reported for
failed chain commands.

Fixes: aac243092b70 ("accel/amdxdna: Add command execution")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Maciej Falkowski <maciej.falkowski@linux.intel.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260203184037.2751889-1-lizhi.hou@amd.com