cmake: kafka: fix OAuth Bearer detection on Windows

Use "FLB_TLS" AS justifaction.

Signed-off-by: BP Cheng <bp_cheng@hotmail.com>

Author: bp-cheng

cmake/kafka.cmake

@@ -32,7 +32,7 @@ endif()
 # - Windows: Built-in SASL, only needs SSL (no Cyrus SASL required)
 # - Linux/macOS: Needs both SSL and Cyrus SASL
 if(WIN32)
-  if(WITH_SSL)
+  if(FLB_TLS)
     set(FLB_SASL_OAUTHBEARER_ENABLED ON)
   else()
     set(FLB_SASL_OAUTHBEARER_ENABLED OFF)