[Skiboot] [RFC PATCH skiboot] npu2: Remove redundand dt_node

[Alexey Kardashevskiy]

The npu2 struct embeds a phb struct which also has a DT node pointer,
use that.

Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---

On witherspoon it is just always NULL.
---
 include/npu2.h     | 1 -
 hw/npu2-opencapi.c | 6 +++---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/npu2.h b/include/npu2.h
index 4c2e20e..34bc650 100644
--- a/include/npu2.h
+++ b/include/npu2.h
@@ -142,7 +142,6 @@ struct npu2_dev {
 
 struct npu2 {
 	uint32_t	index;
-	struct dt_node	*dt_node;
 	uint32_t	chip_id;
 	uint64_t	xscom_base;
 	void		*regs;
diff --git a/hw/npu2-opencapi.c b/hw/npu2-opencapi.c
index 57c2f2f..e55bdcb 100644
--- a/hw/npu2-opencapi.c
+++ b/hw/npu2-opencapi.c
@@ -1584,7 +1584,7 @@ static void npu2_opencapi_setup_device(struct dt_node *dn_link, struct npu2 *n,
 	uint64_t mm_win[2];
 
 	dev_index = dt_prop_get_u32(dn_link, "ibm,npu-link-index");
-	npu_index = dt_prop_get_u32(n->dt_node, "ibm,npu-index");
+	npu_index = dt_prop_get_u32(n->phb_nvlink.dt_node, "ibm,npu-index");
 
 	/* Populate PHB device node */
 	phys_map_get(n->chip_id, NPU_OCAPI_MMIO, dev_index, &mm_win[0],
@@ -1610,7 +1610,8 @@ static void npu2_opencapi_setup_device(struct dt_node *dn_link, struct npu2 *n,
 	dt_add_property_cells(dn_phb, "ibm,npu-index", npu_index);
 	dt_add_property_cells(dn_phb, "ibm,chip-id", n->chip_id);
 	dt_add_property_cells(dn_phb, "ibm,xscom-base", n->xscom_base);
-	dt_add_property_cells(dn_phb, "ibm,npcq", n->dt_node->phandle);
+	dt_add_property_cells(dn_phb, "ibm,npcq",
+			      n->phb_nvlink.dt_node->phandle);
 	dt_add_property_cells(dn_phb, "ibm,links", 1);
 	dt_add_property(dn_phb, "ibm,mmio-window", mm_win, sizeof(mm_win));
 	dt_add_property_cells(dn_phb, "ibm,phb-diag-data-size", 0);
@@ -1730,7 +1731,6 @@ static void npu2_opencapi_probe(struct dt_node *dn)
 	n->chip_id = gcid;
 	n->xscom_base = scom_base;
 	n->regs = (void *)reg[0];
-	n->dt_node = dn;
 
 	dt_for_each_compatible(dn, link, "ibm,npu-link") {
 		dev_index = dt_prop_get_u32(link, "ibm,npu-link-index");
-- 
2.11.0