w83627hf: correct typo in ASL include, correct indexed registers and remove unneccesa...

w83627hf: correct typo in ASL include, correct indexed registers and remove unneccesary _PR0 defs

Correct a typo in devtree.asl which causes AML processors to fail executing
the DSDT with AE_NO_MEMORY or (in case of acpiexec) Divide By Zero.
Also removes an superfluous item in the register IndexField and removes
unneccessary _PR0 definitions which could confuse AML processors.

Change-Id: I02cb9ce4e8f2101cfff8cec4abba7e070fd66364
Signed-off-by: Christoph Grenz <christophg+cb@grenz-bonn.de>
Reviewed-on: http://review.coreboot.org/296
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>