lscpu-cputype.c: assign value to multiple variables (ar->bit32 and ar->bit64)

lscpu-cputype.c: assign value to multiple variables (ar->bit32 and ar->bit64)
clang with -Wcomma will emit an warning of "misuse of comma operator".
Since the value that will be assigned, is the same for both (bit32 and bit64),
just assigning directly to both variables seems reasonable.

Signed-off-by: rilysh <nightquick@proton.me>