[PARISC] Work around machines which do not support chassis warnings
[PARISC] Work around machines which do not support chassis warnings

pdc_chassis v0.05:

Some machines seems not to implement Chassis warn support. Work around these.
Also cleanup a bit of the code.

Signed-off-by: Thibaut VARENE <29d022b2046bb4f16aa934a5923d722cfa2f4295@parisc-linux.org>
Signed-off-by: Kyle McMartin <3c25b01657254677d3e1a8fd1f0742c5d489bd39@parisc-linux.org>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas