soc: mediatek: mtk-socinfo: Add driver for getting chip information

soc: mediatek: mtk-socinfo: Add driver for getting chip information

Add driver for socinfo retrieval. This patch includes the following:
1. mtk-socinfo driver for chip info retrieval
2. Related changes to Makefile and Kconfig

Signed-off-by: William-tw Lin <william-tw.lin@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231222080739.21706-3-william-tw.lin@mediatek.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>