Drop explicit NULL initializations from device_operations

Unmentioned fields are initialized with 0 (or NULL) implicitly. Beside
that, the struct has grown over the years. There are too many optional
fields to list them all.

Change-Id: Icb9e14c58153d7c14817bcde148e86e977666e4b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40126
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/baytrail/chip.c

@@ -28,8 +28,6 @@ static void pci_domain_set_resources(struct device *dev)
 static struct device_operations pci_domain_ops = {
 	.read_resources   = pci_domain_read_resources,
 	.set_resources    = pci_domain_set_resources,
-	.enable_resources = NULL,
-	.init             = NULL,
 	.scan_bus         = pci_domain_scan_bus,
 };
 
@@ -38,7 +36,6 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init             = baytrail_init_cpus,
-	.scan_bus         = NULL,
 };
 
 

src/soc/intel/baytrail/emmc.c

@@ -59,8 +59,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= emmc_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/hda.c

@@ -100,8 +100,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= hda_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/lpe.c

@@ -173,8 +173,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= lpe_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/lpss.c

@@ -171,8 +171,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= lpss_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/northcluster.c

@@ -137,11 +137,6 @@ static void nc_read_resources(struct device *dev)
 static struct device_operations nc_ops = {
 	.read_resources   = nc_read_resources,
 	.acpi_fill_ssdt   = generate_cpu_entries,
-	.set_resources    = NULL,
-	.enable_resources = NULL,
-	.init             = NULL,
-	.enable           = NULL,
-	.scan_bus         = NULL,
 	.ops_pci          = &soc_pci_ops,
 };
 

src/soc/intel/baytrail/sata.c

@@ -212,7 +212,6 @@ static struct device_operations sata_ops = {
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= sata_init,
 	.enable			= sata_enable,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/sd.c

@@ -50,8 +50,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= sd_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/southcluster.c

@@ -523,7 +523,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.acpi_inject_dsdt	= southcluster_inject_dsdt,
 	.write_acpi_tables      = acpi_write_hpet,
-	.enable_resources	= NULL,
 	.init			= sc_init,
 	.enable			= southcluster_enable_dev,
 	.scan_bus		= scan_static_bus,