PCI: dwc: ep: Remove superfluous function dw_pcie_ep_find_ext_capability()

Remove the superfluous function dw_pcie_ep_find_ext_capability(),
as it is virtually identical to dw_pcie_find_ext_capability().

Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250221202646.395252-3-cassel@kernel.org
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

Author: floatious

drivers/pci/controller/dwc/pcie-designware-ep.c

@@ -102,24 +102,6 @@ static u8 dw_pcie_ep_find_capability(struct dw_pcie_ep *ep, u8 func_no, u8 cap)
 	return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap);
 }
 
-static unsigned int dw_pcie_ep_find_ext_capability(struct dw_pcie *pci, int cap)
-{
-	u32 header;
-	int pos = PCI_CFG_SPACE_SIZE;
-
-	while (pos) {
-		header = dw_pcie_readl_dbi(pci, pos);
-		if (PCI_EXT_CAP_ID(header) == cap)
-			return pos;
-
-		pos = PCI_EXT_CAP_NEXT(header);
-		if (!pos)
-			break;
-	}
-
-	return 0;
-}
-
 static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
 				   struct pci_epf_header *hdr)
 {
@@ -230,7 +212,7 @@ static unsigned int dw_pcie_ep_get_rebar_offset(struct dw_pcie *pci,
 	unsigned int offset, nbars;
 	int i;
 
-	offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
+	offset = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
 	if (!offset)
 		return offset;
 
@@ -846,7 +828,7 @@ static void dw_pcie_ep_init_non_sticky_registers(struct dw_pcie *pci)
 	enum pci_barno bar;
 	u32 reg, i, val;
 
-	offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
+	offset = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
 
 	dw_pcie_dbi_ro_wr_en(pci);
 
@@ -969,7 +951,7 @@ int dw_pcie_ep_init_registers(struct dw_pcie_ep *ep)
 	if (ep->ops->init)
 		ep->ops->init(ep);
 
-	ptm_cap_base = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_PTM);
+	ptm_cap_base = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_PTM);
 
 	/*
 	 * PTM responder capability can be disabled only after disabling