[IB] mthca: Better limit checking and reporting

Check the sizes of CQs, QPs and SRQs when creating objects, and fail
instead of creating too-big queues.  Also return real limits instead
of just plausible-sounding values from mthca_query_device().

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/mthca/mthca_mcg.c

@@ -37,10 +37,6 @@
 #include "mthca_dev.h"
 #include "mthca_cmd.h"
 
-enum {
-	MTHCA_QP_PER_MGM = 4 * (MTHCA_MGM_ENTRY_SIZE / 16 - 2)
-};
-
 struct mthca_mgm {
 	__be32 next_gid_index;
 	u32    reserved[3];