IB/ipath: Generalize some xxx_SHIFT macros

In preparation for upcoming chips that have different values for
INFINIPATH_R_PORTENABLE_SHIFT, INFINIPATH_R_INTRAVAIL_SHIFT,
INFINIPATH_R_TAILUPD_SHIFT, and portcfg_shift, remove the shared
#defines and use device-specific variables instead.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c
index e161cad..cf64d38 100644
--- a/drivers/infiniband/hw/ipath/ipath_init_chip.c
+++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c
@@ -508,9 +508,9 @@
 	 * enable port 0 receive, and receive interrupt.  other ports
 	 * done as user opens and inits them.
 	 */
-	dd->ipath_rcvctrl = INFINIPATH_R_TAILUPD |
-		(1ULL << INFINIPATH_R_PORTENABLE_SHIFT) |
-		(1ULL << INFINIPATH_R_INTRAVAIL_SHIFT);
+	dd->ipath_rcvctrl = (1ULL << dd->ipath_r_tailupd_shift) |
+		(1ULL << dd->ipath_r_portenable_shift) |
+		(1ULL << dd->ipath_r_intravail_shift);
 	ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
 			 dd->ipath_rcvctrl);