Touchpad reports at about 73 Hz in polling mode #2

With -vi2c-force-polling the touchpad delivers about 73 HID reports a second while a finger moves (~/.cache/legion/tp/tp, 10 s). Interrupt-driven precision touchpads usually report at 125 Hz or more, so pointer motion may feel less smooth than it should. Interrupt mode on the Arrow Lake I2C controller is the fix to look at.

Tested on Lenovo Legion 5 15IAX10, MT7925, macOS 26.7.1 (25G241). Evidence: project-legion evidence/native/featuretest-2026-10-18/A/in.tprate.txt.