x86/cpu: Simplify TLB entry count storage

Commit:

  e0ba94f1 ("x86/tlb_info: get last level TLB entry number of CPU")

introduced u16 "info" arrays for each TLB type.

Since 2012 and each array stores just one type of information: the
number of TLB entries for its respective TLB type.

Replace such arrays with simple variables.

Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250304085152.51092-8-darwi@linutronix.de