west: linkserver: Fix version detect for ihex support

scripts/west_commands/runners/linkserver.py

@@ -188,7 +188,7 @@ def flash(self, **kwargs):
             self.do_erase()
 
         # Use .elf, .hex or .bin, preferring .hex over .elf over .bin
-        if self.supports_hex and self.hex_name is not None and os.path.isfile(self.hex_name):
+        if self.supports_hex() and self.hex_name is not None and os.path.isfile(self.hex_name):
             flash_cmd = (["load", self.hex_name])
         elif self.elf_name is not None and os.path.isfile(self.elf_name):
             flash_cmd = (["load", self.elf_name])