soc: mediatek: mtk-svs: Cleanup of svs_probe() function

Cleanup the svs_probe() function: use dev_err_probe() where possible,
change some efuse read failure gotos and then remove now impossible
IS_ERR_OR_NULL() checks (as they will never return true) for nvmem
(efuse read) failures.
Also remove some unnecessary blank lines.

Link: https://lore.kernel.org/r/20231121125044.78642-16-angelogioacchino.delregno@collabora.com


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>