accel/amdxdna: Fix incorrect return value in aie2_hwctx_sync_debug_bo()

accel/amdxdna: Fix incorrect return value in aie2_hwctx_sync_debug_bo()

When the driver issues the SYNC_DEBUG_BO command, it currently returns 0
even if the firmware fails to execute the command. Update the driver to
return -EINVAL in this case to properly indicate the failure.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/dri-devel/aPsadTBXunUSBByV@stanley.mountain/
Fixes: 7ea046838021 ("accel/amdxdna: Support firmware debug buffer")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20251024162608.1544842-1-lizhi.hou@amd.com