powerpc/fsl_pci: Fix pci stack build bug with FRAME_WARN

Fix this:

  CC      arch/powerpc/sysdev/fsl_pci.o
arch/powerpc/sysdev/fsl_pci.c: In function 'fsl_pcie_check_link':
arch/powerpc/sysdev/fsl_pci.c:91:1: error: the frame size of 1360 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

when configuring FRAME_WARN, by refactoring indirect_read_config()
to take hose and bus number instead of the 1344-byte struct pci_bus.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 6455c1e..7cc215e 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -68,13 +68,10 @@
 	u32 val = 0;
 
 	if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
-		if (hose->ops->read == fsl_indirect_read_config) {
-			struct pci_bus bus;
-			bus.number = hose->first_busno;
-			bus.sysdata = hose;
-			bus.ops = hose->ops;
-			indirect_read_config(&bus, 0, PCIE_LTSSM, 4, &val);
-		} else
+		if (hose->ops->read == fsl_indirect_read_config)
+			__indirect_read_config(hose, hose->first_busno, 0,
+					       PCIE_LTSSM, 4, &val);
+		else
 			early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
 		if (val < PCIE_LTSSM_L0)
 			return 1;