x86/PCI: Fix coding style in PIRQ table verification

Remove an extraneous space with a cast in `pirq_check_routing_table'.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2203310017260.44113@angie.orcam.me.uk

arch/x86/pci/irq.c

@@ -77,7 +77,7 @@ static inline struct irq_routing_table *pirq_check_routing_table(u8 *addr,
 	int i;
 	u8 sum;
 
-	rt = (struct irq_routing_table *) addr;
+	rt = (struct irq_routing_table *)addr;
 	if (rt->signature != PIRQ_SIGNATURE ||
 	    rt->version != PIRQ_VERSION ||
 	    rt->size % 16 ||