ASoC: Intel: soc-acpi: mtl: fix speaker no sound on Dell SKU 0C64

Dell SKU 0C64 has a single rt1318 amplifier.
The prefix name of control still needs to be set rt1318-1 corresponding to UCM config.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://msgid.link/r/20240612075740.1678082-1-shumingf@realtek.com


Signed-off-by: Mark Brown <broonie@kernel.org>