soc/intel/broadwell: Fix 16-bit read/write PCI_COMMAND register

Change-Id: I0fd1a758d8838b3eea5640b41eee6a6893360aa3
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40850
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/soc/intel/broadwell/minihd.c b/src/soc/intel/broadwell/minihd.c
index 2dcab97..da0b42a 100644
--- a/src/soc/intel/broadwell/minihd.c
+++ b/src/soc/intel/broadwell/minihd.c
@@ -62,8 +62,7 @@
 	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_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
 
 	/* Mini-HD configuration */
 	reg32 = read32(base + 0x100c);