ALSA: hda: cs35l41: Fix missing error code in cs35l41_smart_amp()

ALSA: hda: cs35l41: Fix missing error code in cs35l41_smart_amp()

When firmware status is invalid, assign -EINVAL to ret as ret is '0' at
that point and returning success is incorrect when firmware status is
invalid.

Fixes: a51d8ba03a4f ("ALSA: hda: cs35l41: Check CSPL state after loading firmware")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://lore.kernel.org/r/20231030070836.3234385-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>