qcacld-3.0: Fix a possible information leak

The function hdd_validate_adapter() can expose kernel address space
with a bad adapter pointer. Fix this by removing unwanted information
from the error print.

Change-Id: I65caab9d710e031992661efdf6f8c72d0c7bf82c
CRs-Fixed: 2235225
diff --git a/core/hdd/src/wlan_hdd_main.c b/core/hdd/src/wlan_hdd_main.c
index d6ff933..f9e011c 100644
--- a/core/hdd/src/wlan_hdd_main.c
+++ b/core/hdd/src/wlan_hdd_main.c
@@ -893,8 +893,7 @@
 	}
 
 	if (adapter->magic != WLAN_HDD_ADAPTER_MAGIC) {
-		hdd_err("bad adapter magic: 0x%x (should be 0x%x)",
-			adapter->magic, WLAN_HDD_ADAPTER_MAGIC);
+		hdd_err("bad adapter magic");
 		return -EINVAL;
 	}