ASoC: rt5645: fix add missing widget

"IF1 DAC0" and "IF1 DAC3" are used in rt5645_dapm_routes but missing
in rt5645_dapm_widgets.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>