Add initial sysfs support (taken from upstream work)
treebc0600671457d7c4d0e1365a6e1ef87015c6be2d
-rw-r--r-- 2232 ChangeLog
-rw-r--r-- 1780 Makefile
-rw-r--r-- 1368 NEWS
-rw-r--r-- 3710 README
-rw-r--r-- 37733 acer_acpi.c