arm64: kvm: trace_handle_exit: use string choices helper

We can use string choices helper, let's use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87o6ti5ksx.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

Author: morimoto

arch/arm64/kvm/trace_handle_exit.h

@@ -113,7 +113,7 @@ TRACE_EVENT(kvm_sys_access,
 		  __entry->vcpu_pc, __entry->name ?: "UNKN",
 		  __entry->Op0, __entry->Op1, __entry->CRn,
 		  __entry->CRm, __entry->Op2,
-		  __entry->is_write ? "write" : "read")
+		  str_write_read(__entry->is_write))
 );
 
 TRACE_EVENT(kvm_set_guest_debug,