nb/intel/haswell: Use PCI bitwise ops

Tested with BUILD_TIMELESS=1, Asrock B85M Pro4 does not change.

Change-Id: I99379299f7e744a3e906bdbc46d55060d9c75d6a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42153
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/haswell/minihd.c b/src/northbridge/intel/haswell/minihd.c
index 71ca1e6..c6b5a12 100644
--- a/src/northbridge/intel/haswell/minihd.c
+++ b/src/northbridge/intel/haswell/minihd.c
@@ -59,8 +59,7 @@
 	printk(BIOS_DEBUG, "Mini-HD: base = %p\n", base);
 
 	/* Set Bus Master */
-	reg32 = pci_read_config32(dev, PCI_COMMAND);
-	pci_write_config32(dev, PCI_COMMAND, reg32 | PCI_COMMAND_MASTER);
+	pci_or_config32(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
 
 	/* Mini-HD configuration */
 	reg32 = read32(base + 0x100c);