lightnvm: pblk: fix bad le64 assignations

Use the right types and conversions on le64 variables. Reported by
sparse.

Signed-off-by: Javier González <[e-mail]>
Signed-off-by: Matias Bjørling <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/lightnvm/pblk-core.c

···
 		rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
 
 		if (dir == WRITE) {
-			u64 addr_empty = cpu_to_le64(ADDR_EMPTY);
+			__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
 
 			meta_list[i].lba = lba_list[paddr] = addr_empty;
 		}

drivers/lightnvm/pblk-gc.c

···
 						 struct list_head *group_list)
 {
 	struct pblk_line *line, *victim;
+	int line_vsc, victim_vsc;
 
 	victim = list_first_entry(group_list, struct pblk_line, list);
 	list_for_each_entry(line, group_list, list) {
-		if (*line->vsc < *victim->vsc)
+		line_vsc = le32_to_cpu(*line->vsc);
+		victim_vsc = le32_to_cpu(*victim->vsc);
+		if (line_vsc < victim_vsc)
 			victim = line;
 	}
 

drivers/lightnvm/pblk-map.c

···
 			lba_list[paddr] = cpu_to_le64(w_ctx->lba);
 			line->nr_valid_lbas++;
 		} else {
-			u64 addr_empty = cpu_to_le64(ADDR_EMPTY);
+			__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
 
 			lba_list[paddr] = meta_list[i].lba = addr_empty;
 			__pblk_map_invalidate(pblk, line, paddr);

drivers/lightnvm/pblk-recovery.c

···
 
 		for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) {
 			struct ppa_addr dev_ppa;
-			u64 addr_empty = cpu_to_le64(ADDR_EMPTY);
+			__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
 
 			dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id);