soc/mediatek/common: Move PCIe definition to the common directory

To reduce duplicate pcie.h in other SOC folder, mocw pcie.h to
mediatek/common folder

TEST=Build pass
BUG=b:317009620

Change-Id: I8e29ed4027433700652b07b3461eeb8546d45c9b
Signed-off-by: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84853
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>

src/soc/mediatek/common/include/soc/pcie.h

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
 
-#ifndef SOC_MEDIATEK_MT8195_PCIE_H
-#define SOC_MEDIATEK_MT8195_PCIE_H
+#ifndef SOC_MEDIATEK_COMMON_PCIE_H
+#define SOC_MEDIATEK_COMMON_PCIE_H
 
 #include <soc/pcie_common.h>
 #include <types.h>