i40iw: Add Quality of Service support

Add support for QoS on QPs. Upon device initialization,
a map is created from user priority to queue set
handles. On QP creation, use ToS to look up the queue
set handle for use with the QP.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/i40iw/i40iw_d.h

@@ -74,6 +74,8 @@
 #define RS_32_1(val, bits)      (u32)(val >> bits)
 #define I40E_HI_DWORD(x)        ((u32)((((x) >> 16) >> 16) & 0xFFFFFFFF))
 
+#define QS_HANDLE_UNKNOWN       0xffff
+
 #define LS_64(val, field) (((u64)val << field ## _SHIFT) & (field ## _MASK))
 
 #define RS_64(val, field) ((u64)(val & field ## _MASK) >> field ## _SHIFT)