platform/x86: fujitsu-laptop: update debug message logged by call_fext_func()

Update debug message logged when the acpi_evaluate_integer() call inside
call_fext_func() fails so that it covers a broader set of possible
errors.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

drivers/platform/x86/fujitsu-laptop.c

@@ -232,7 +232,7 @@ static int call_fext_func(int func, int op, int feature, int state)
 	status = acpi_evaluate_integer(fujitsu_laptop->acpi_handle, "FUNC",
 				       &arg_list, &value);
 	if (ACPI_FAILURE(status)) {
-		vdbg_printk(FUJLAPTOP_DBG_ERROR, "FUNC interface is not present\n");
+		vdbg_printk(FUJLAPTOP_DBG_ERROR, "Failed to evaluate FUNC\n");
 		return -ENODEV;
 	}