intel PCI ops: Remove explicit PCI MMCONF access

MMCONF was explicitly used here to avoid races of 0xcf8/0xcfc access
being non-atomic and/or need to access 4kiB of PCI config space.

All these platforms now have MMCONF_SUPPORT_DEFAULT.

Change-Id: I943e354af0403e61263f1c780f02c7b463b3fe11
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/17529
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/mainboard/gigabyte/ga-b75m-d3h/romstage.c b/src/mainboard/gigabyte/ga-b75m-d3h/romstage.c
index 0cac509..bb3b223 100644
--- a/src/mainboard/gigabyte/ga-b75m-d3h/romstage.c
+++ b/src/mainboard/gigabyte/ga-b75m-d3h/romstage.c
@@ -95,7 +95,7 @@
 	RCBA32(0x35a0) = 0xc0300c03;
 	RCBA32(0x35a4) = 0x00241803;
 
-	pcie_write_config32 (PCI_DEV (0, 0x14, 0), 0xe4, 0x00000000);
+	pci_write_config32 (PCI_DEV (0, 0x14, 0), 0xe4, 0x00000000);
 
 	outw (0x0000, DEFAULT_PMBASE | 0x003c);