IB/isert: Simplify signature cap check

Use if/else clause instead of "condition ? val1 : val2" to make the code
cleaner and simpler.

Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Israel Rukshin <[e-mail]>
Signed-off-by: Max Gurtovoy <[e-mail]>
Acked-by: Sagi Grimberg <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

drivers/infiniband/ulp/isert/ib_isert.c

···
 	}
 
 	/* Check signature cap */
-	device->pi_capable = ib_dev->attrs.device_cap_flags &
-			     IB_DEVICE_INTEGRITY_HANDOVER ? true : false;
+	if (ib_dev->attrs.device_cap_flags & IB_DEVICE_INTEGRITY_HANDOVER)
+		device->pi_capable = true;
+	else
+		device->pi_capable = false;
 
 	return 0;
 }