sta_set_*: Fix a typo in PMF argument disable value parsing

This is documented to use PMF,Disable not PMF,Disabled. Maintain the old
version as an alias just in case it was used in some existing test
scripts.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
diff --git a/sta.c b/sta.c
index e3dc064..978fb93 100644
--- a/sta.c
+++ b/sta.c
@@ -1500,6 +1500,7 @@
 			if (set_network(ifname, id, "ieee80211w", "1") < 0)
 				return -2;
 		} else if (strcasecmp(val, "Disabled") == 0 ||
+			   strcasecmp(val, "Disable") == 0 ||
 			   strcasecmp(val, "Forced_Disabled") == 0) {
 			dut->sta_pmf = STA_PMF_DISABLED;
 		} else {