docs: genericirq.rst: remove extra parenthesis in function definition

In the paragraph titled "Default flow implementations", the helper
function definition (simplified excerpt) for

  noop(struct irq_data *data)

had an extraneous closing parenthesis. This commit removes the
unnecessary parenthesis, correcting the function definition.

Signed-off-by: Chih-Wei Chien <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: idoleat

Documentation/core-api/genericirq.rst

@@ -210,7 +210,7 @@ implemented (simplified excerpt)::
         }
     }
 
-    noop(struct irq_data *data))
+    noop(struct irq_data *data)
     {
     }