bnxt_re/lib: Fix doorbell fifo register read

Doorbell FIFO information register is a 32 bit register. Reading
it as a 64bit from the BAR area may give wrong values. So change the
variable pointer to 32 bit.

Fixes: ef9d1cd ("bnxt_re/lib: Implement doorbell pacing algorithm")
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>

providers/bnxt_re/db.c

@@ -54,7 +54,7 @@ static int calculate_fifo_occupancy(struct bnxt_re_context *cntx)
  struct bnxt_re_dev *rdev = cntx->rdev;
  uint32_t read_val, fifo_occup;
  uint64_t fifo_reg_off;
- uint64_t *dbr_map;
+ uint32_t *dbr_map;
 
  fifo_reg_off = pacing_data->grc_reg_offset & ~(BNXT_RE_PAGE_MASK(rdev->pg_size));
  dbr_map = cntx->bar_map + fifo_reg_off;