x86/hwmon: remove inclusion of unnecessary headers from {core, pkg, via-cpu}temp.c

These likely originate from these drivers being clones of one another
and/or other drivers which actually needed these includes.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

diff --cc drivers/hwmon/coretemp.c
Simple merge

diff --cc drivers/hwmon/pkgtemp.c
Simple merge

diff --cc drivers/hwmon/via-cputemp.c
Simple merge