Merge tag 'x86-urgent-2026-07-19' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull x86 fixes from Ingo Molnar:

 - Reject too long acpi_rsdp= boot parameter values (Thorsten Blum)

 - Validate console=uart8250 baud rate to fix early boot hang (Thorsten
   Blum)

 - Remove dead Makefile rule (Ethan Nelson-Moore)

* tag 'x86-urgent-2026-07-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Validate console=uart8250 baud rate to fix early boot hang
  x86/boot: Reject too long acpi_rsdp= values
  x86/cpu: Remove Makefile rule for removed UMC CPU support