Revert "clang-format: change column limit to 100"

This reverts commit 5e458e8f.

Reason for revert: Bluetooth code base has always been using 120 cols lines, if we change this to 100, many other merge conflicts may arise.

We should change the linter to support 120 lines for Bluetooth.

Test: Upload this CL
Change-Id: Ib8e825421acf3d7b50ab8dca7a8a86d9cb30fb00