x86/irq: Clean up VECTOR_UNDEFINED and VECTOR_RETRIGGERED definition
x86/irq: Clean up VECTOR_UNDEFINED and VECTOR_RETRIGGERED definition

During another patch review, David Rientjes noted that
VECTOR_UNDEFINED and VECTOR_RETRIGGERED should be defined with ()s
so that they are not erroneously used in an arithmetic operation.

Suggested-by: David Rientjes <d8cd2994e15bc61ddb2b113030bda55eebc3a0fe@google.com>
Signed-off-by: Prarit Bhargava <fe4655370dc87a32329d591d6e8472329333dfad@redhat.com>
Cc: Seiji Aguchi <3bab11a9318ee669e0dd28af4ddfc6d4bd42b158@hds.com>
Cc: Yang Zhang <e941dd2dd940d198dc2651f51bd002f65d602f78@Intel.com>
Link: http://lkml.kernel.org/r/1396440827-18352-1-git-send-email-fe4655370dc87a32329d591d6e8472329333dfad@redhat.com
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs