IB/rdamvt: fix cross build with rdmavt

The new check routine causes a larger than supported frame size
on s390.

Changing the check routine to noinline fixes the issue.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/sw/rdmavt/vt.c

@@ -383,7 +383,7 @@ static inline int check_driver_override(struct rvt_dev_info *rdi,
 	return 1;
 }
 
-static int check_support(struct rvt_dev_info *rdi, int verb)
+static noinline int check_support(struct rvt_dev_info *rdi, int verb)
 {
 	switch (verb) {
 	case MISC: