CONFIG_TEGRA_PCI is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

PCI Express support

modulename: pcie.ko

configname: CONFIG_TEGRA_PCI

Linux Kernel Configuration
└─>PCI Express support
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
source code:
arch/arm/mach-tegra/pcie.c
selects
CONFIG_PCI