Remove ThunderX PCIe FDT quirks from pci_host_generic_fdt.c

[kd]

Summary

ThunderX is the only board known to use them.
Move them to the ThunderX PCIe driver.

Test Plan

Boot a ThuderX board, verify that the network(vnic) still works.

[andrew]

sys/arm64/cavium/thunder_pcie_fdt.c

236–300

Is this function needed? It looks like we could move the RMAN_IS_DEFAULT_RANGE code to pci_host_generic_core_alloc_resource and just remove this.

[kd]

sys/arm64/cavium/thunder_pcie_fdt.c

236–300

We still need to call thunder_pcie_alloc_resource if no dts node was found.
Also the code under RMAN_IS_DEFAULT_RANGE condition is specific only to the quirk implemented in this diff, I'm not sure if we want it in the generic driver.
We could still call pci_host_generic_core_alloc_resource in order to avoid duplication of the address translation code.
I tried doing just that, but it didn't work.
On TX1 dts is provided directly by firmware.
It looks like we have two overlapping regions:
First: rman_reserve_resource_bound: <PCIe Memory> request: [0x87e005003800, 0x87e00500382f], length 0x30, flags 2, device thunder_mdio0
Then: rman_reserve_resource_bound: <PCIe Memory> request: [0x87e005000000, 0x87e0057fffff], length 0x800000, flags 0, device (null)

The second allocation causes rman_reserve_resource to fail.
Any thoughts?