x86/irq: drop fixup_irqs() parameters

x86/irq: drop fixup_irqs() parameters

The solely remaining caller always passes the same globally available
parameters.  Drop the parameters and modify fixup_irqs() to use
cpu_online_map in place of the input mask parameter, and always be verbose
in its output printing.

While there remove some of the checks given the single context where
fixup_irqs() is now called, which should always be in the CPU offline path,
after the CPU going offline has been removed from cpu_online_map.

No functional change intended.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Release-Acked-by: Oleksii Kurochko<oleksii.kurochko@gmail.com>