driver core: cpu: Fix the fallback cpu_show_gds() name

In

  6524c798 ("driver core: cpu: Make cpu_show_not_affected() static")

I fat-fingered the name of cpu_show_gds(). Usually, I'd rebase but since
those are extraordinary embargoed times, the commit above was already
pulled into another tree so no no.

Therefore, fix it ontop.

Fixes: 6524c798 ("driver core: cpu: Make cpu_show_not_affected() static")
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230811095831.27513-1-bp@alien8.de