KVM: PPC: Book3S: Assign boolean values to a bool variable

Fix the following coccinelle warnings:

./arch/powerpc/kvm/book3s_xics.c:476:3-15: WARNING: Assignment of 0/1 to bool variable
./arch/powerpc/kvm/book3s_xics.c:504:3-15: WARNING: Assignment of 0/1 to bool variable

Reported-by: Tosk Robot <[e-mail]>
Signed-off-by: Kaixu Xia <[e-mail]>
Reviewed-by: Greg Kurz <[e-mail]>
Acked-by: Paul Mackerras <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/powerpc/kvm/book3s_xics.c

···
 			arch_spin_unlock(&ics->lock);
 			local_irq_restore(flags);
 			new_irq = reject;
-			check_resend = 0;
+			check_resend = false;
 			goto again;
 		}
 	} else {
···
 			state->resend = 0;
 			arch_spin_unlock(&ics->lock);
 			local_irq_restore(flags);
-			check_resend = 0;
+			check_resend = false;
 			goto again;
 		}
 	}