Kernel: Add PCI helpers to enable and disable the interrupt line

Author: https://github.com/supercomputer7
Commit: 3539666ac9
Pull-request: https://github.com/SerenityOS/serenity/pull/1274
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/shannonbooth

Kernel/PCI/Definitions.h

@@ -165,6 +165,8 @@ struct ChangeableAddress : public Address {
 
 ID get_id(PCI::Address);
 void enumerate_all(Function<void(Address, ID)> callback);
+void enable_interrupt_line(Address);
+void disable_interrupt_line(Address);
 u8 get_interrupt_line(Address);
 u32 get_BAR0(Address);
 u32 get_BAR1(Address);