mb/siemens/mc_apl1: Use `pci_or_config16` function

Change-Id: I93e09fc9801f6d32cade351bac0cba82f671acfe
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47400
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Tested-by: siemens-bot
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c
index e7bc589..000ee08 100644
--- a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c
+++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c
@@ -16,14 +16,11 @@
 void variant_mainboard_final(void)
 {
 	struct device *dev;
-	uint16_t cmd = 0;
 
 	/* Set Master Enable for on-board PCI device. */
 	dev = dev_find_device(PCI_VENDOR_ID_SIEMENS, 0x403e, 0);
 	if (dev) {
-		cmd = pci_read_config16(dev, PCI_COMMAND);
-		cmd |= PCI_COMMAND_MASTER;
-		pci_write_config16(dev, PCI_COMMAND, cmd);
+		pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
 	}
 }