drm/amdkfd: Fix boolreturn.cocci warnings

Return statements in functions returning bool should use
true/false instead of 1/0.

drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c:40:9-10:
WARNING: return of 0/1 in function 'event_interrupt_isr_v9' with return type bool

Generated by: scripts/coccinelle/misc/boolreturn.cocci
Signed-off-by: Aishwarya Ramakrishnan <aishwaryarj100@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c

@@ -37,7 +37,7 @@ static bool event_interrupt_isr_v9(struct kfd_dev *dev,
 	vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
 	if (vmid < dev->vm_info.first_vmid_kfd ||
 	    vmid > dev->vm_info.last_vmid_kfd)
-		return 0;
+		return false;
 
 	source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
 	client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
@@ -69,7 +69,7 @@ static bool event_interrupt_isr_v9(struct kfd_dev *dev,
 
 	/* If there is no valid PASID, it's likely a bug */
 	if (WARN_ONCE(pasid == 0, "Bug: No PASID in KFD interrupt"))
-		return 0;
+		return false;
 
 	/* Interrupt types we care about: various signals and faults.
 	 * They will be forwarded to a work queue (see below).