soc/intel/skylake: Remove set_subsystem() from SoC

Intel common PCI driver is handle PCI subsystem ID
programming, hence no need to have an explicit soc
function to do the same.

TEST=PCI subsystem id is getting programming during
pci enumeration.

Change-Id: Iead57a286b26d532e578cfff99f412c23fd4c2fe
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22769
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/skylake/chip.c

@@ -824,18 +824,3 @@ void soc_display_silicon_init_params(const SILICON_INIT_UPD *original,
 		original->FastPkgCRampDisable,
 		params->FastPkgCRampDisable);
 }
-
-static void pci_set_subsystem(device_t dev, unsigned int vendor,
-	unsigned int device)
-{
-	if (!vendor || !device)
-		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
-				   pci_read_config32(dev, PCI_VENDOR_ID));
-	else
-		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
-				   (device << 16) | vendor);
-}
-
-struct pci_operations soc_pci_ops = {
-	.set_subsystem = &pci_set_subsystem
-};

src/soc/intel/skylake/chip_fsp20.c

@@ -293,10 +293,6 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	soc_irq_settings(params);
 }
 
-struct pci_operations soc_pci_ops = {
-	.set_subsystem = &pci_dev_set_subsystem
-};
-
 /* Mainboard GPIO Configuration */
 __attribute__((weak)) void mainboard_silicon_init_params(FSP_S_CONFIG *params)
 {

src/soc/intel/skylake/include/fsp11/soc/ramstage.h

@@ -29,7 +29,6 @@ void soc_irq_settings(FSP_SIL_UPD *params);
 void soc_init_pre_device(void *chip_info);
 void soc_fsp_load(void);
 const char *soc_acpi_name(const struct device *dev);
-extern struct pci_operations soc_pci_ops;
 
 /* Get igd framebuffer bar */
 uintptr_t fsp_soc_get_igd_bar(void);

src/soc/intel/skylake/include/fsp20/soc/ramstage.h

@@ -32,6 +32,4 @@ void soc_init_pre_device(void *chip_info);
 void soc_irq_settings(FSP_SIL_UPD *params);
 const char *soc_acpi_name(const struct device *dev);
 
-extern struct pci_operations soc_pci_ops;
-
 #endif