Change CAS_BIO_MAX_VECS value

Previously when user tried to allocate to big bio he recieved NULL. As the
behavior was changed to `BUG()` passing out of range value is no longer legal.

Limiting the requested bio size to BIO_MAX_PAGES (on the older kernels) or to
BIO_MAX_VECS (on the newer ones) eliminates the problem as the macros represent
the max possible value.

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>

configure.d/1_bio_max_vecs.conf

@@ -20,9 +20,9 @@ check() {
 apply() {
     case "$1" in
     "1")
-	;;
+        add_define "CAS_BIO_MAX_VECS ((uint32_t)BIO_MAX_VECS)" ;;
     "2")
-        add_define "BIO_MAX_VECS ((uint32_t)(-1))" ;;
+        add_define "CAS_BIO_MAX_VECS ((uint32_t)BIO_MAX_PAGES)" ;;
     *)
         exit 1
     esac