hw/net/e1000e_core: Let e1000e_can_receive() return a boolean

The e1000e_can_receive() function simply returns a boolean value.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

hw/net/e1000e_core.c

@@ -967,7 +967,7 @@ e1000e_start_recv(E1000ECore *core)
     }
 }
 
-int
+bool
 e1000e_can_receive(E1000ECore *core)
 {
     int i;

hw/net/e1000e_core.h

@@ -143,7 +143,7 @@ e1000e_core_set_link_status(E1000ECore *core);
 void
 e1000e_core_pci_uninit(E1000ECore *core);
 
-int
+bool
 e1000e_can_receive(E1000ECore *core);
 
 ssize_t