hsi: clients: Change return type to vm_fault_t

Use new return type vm_fault_t for fault handler. For
now, this is just documenting that the function returns
a VM_FAULT value rather than an errno. Once all instances
are converted, vm_fault_t will become a distinct type.

Reference id -> 1c8f422059 ("mm: change return type to
vm_fault_t")

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

drivers/hsi/clients/cmt_speech.c

@@ -1098,7 +1098,7 @@ static void cs_hsi_stop(struct cs_hsi_iface *hi)
 	kfree(hi);
 }
 
-static int cs_char_vma_fault(struct vm_fault *vmf)
+static vm_fault_t cs_char_vma_fault(struct vm_fault *vmf)
 {
 	struct cs_char *csdata = vmf->vma->vm_private_data;
 	struct page *page;