Adjust to deprecated validation functions

- The "svalid" functions (e.g. svalid_value) have been deprecated.  The
  new method is to use the corresponding "valid" function (e.g.
  valid_value).

- Also, valid_range now takes lower and upper args (vs. the old
  "<lower>..<upper>" string).

Change-Id: Ib554b4991c8a2ef8925380003941e355aa5cadd6
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/openbmc_ffdc.py b/lib/openbmc_ffdc.py
index 5292b79..0d64a56 100644
--- a/lib/openbmc_ffdc.py
+++ b/lib/openbmc_ffdc.py
@@ -134,8 +134,8 @@
             if FFDC_LOG_PATH == "":
                 FFDC_LOG_PATH = os.path.dirname(
                     BuiltIn().get_variable_value("${LOG_FILE}")) + "/"
-            error_message = gv.svalid_value(FFDC_LOG_PATH,
-                                            var_name="FFDC_LOG_PATH")
+            error_message = gv.valid_value(FFDC_LOG_PATH,
+                                           var_name="FFDC_LOG_PATH")
             if error_message != "":
                 error_message = gp.sprint_error_report(error_message)
                 BuiltIn().fail(error_message)