doc: fix quite a few typos within Documentation

Documentation/ABI/testing/dev-kmsg

Documentation/ABI/testing/sysfs-devices-power

Documentation/ABI/testing/sysfs-driver-ppi

Documentation/dma-buf-sharing.txt

Documentation/fault-injection/notifier-error-inject.txt

Documentation/hid/uhid.txt

Documentation/input/alps.txt

Documentation/kbuild/modules.txt

Documentation/misc-devices/mei/mei-amt-version.c

Documentation/video4linux/bttv/Cards

Documentation/vm/frontswap.txt