ACPI: Revert conflicting workaround for BIOS w/ mangled PRT entries

ACPI: Revert conflicting workaround for BIOS w/ mangled PRT entries

upstream 82babbb3887e234c995626e4121d411ea9070ca5
backported to apply cleanly to 2.6.27.21
and apply with offset -1 to 2.6.28.9

2f894ef9c8b36a35d80709bedca276d2fc691941
in Linux-2.6.21 worked around BIOS with mangled _PRT entries:
http://bugzilla.kernel.org/show_bug.cgi?id=6859

d0e184abc5983281ef189db2c759d65d56eb1b80
worked around the same issue via ACPICA, and shipped in 2.6.27.

Unfortunately the two workarounds conflict:
http://bugzilla.kernel.org/show_bug.cgi?id=12270

So revert the Linux specific one.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>