Remove MYSQLND_COMPRESSION_WANTED define

Instead directly define MYSQLND_COMPRESSION_ENABLED. This also
matches what config.w32 does.

Author: nikic

ext/mysqlnd/config9.m4

@@ -27,7 +27,7 @@ if test "$PHP_MYSQLND" != "no" || test "$PHP_MYSQLND_ENABLED" = "yes"; then
     PKG_CHECK_MODULES([ZLIB], [zlib])
     PHP_EVAL_LIBLINE($ZLIB_LIBS, MYSQLND_SHARED_LIBADD)
     PHP_EVAL_INCLINE($ZLIB_CFLAGS)
-    AC_DEFINE([MYSQLND_COMPRESSION_WANTED], 1, [Enable compressed protocol support])
+    AC_DEFINE([MYSQLND_COMPRESSION_ENABLED], 1, [Enable compressed protocol support])
   fi
 
   AC_DEFINE([MYSQLND_SSL_SUPPORTED], 1, [Enable core mysqlnd SSL code])

ext/mysqlnd/mysqlnd.h

@@ -46,10 +46,6 @@
 #define MYSQLND_DBG_ENABLED 0
 #endif
 
-#if defined(MYSQLND_COMPRESSION_WANTED)
-#define MYSQLND_COMPRESSION_ENABLED 1
-#endif
-
 #ifdef ZTS
 #include "TSRM.h"
 #endif