powerpc/rtas: use correct function name for resetting TCE tables

In the Linux kernel, the following vulnerability has been resolved:

powerpc/rtas: use correct function name for resetting TCE tables

The PAPR spec spells the function name as

"ibm,reset-pe-dma-windows"

but in practice firmware uses the singular form:

"ibm,reset-pe-dma-window"

in the device tree. Since we have the wrong spelling in the RTAS

function table, reverse lookups (token -> name) fail and warn:

unexpected failed lookup for token 86

WARNING: CPU: 1 PID: 545 at arch/powerpc/kernel/rtas.c:659 __do_enter_rtas_trace+0x2a4/0x2b4

CPU: 1 PID: 545 Comm: systemd-udevd Not tainted 6.8.0-rc4 #30

Hardware name: IBM,9105-22A POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NL1060_028) hv:phyp pSeries

NIP [c0000000000417f0] __do_enter_rtas_trace+0x2a4/0x2b4

LR [c0000000000417ec] __do_enter_rtas_trace+0x2a0/0x2b4

Call Trace:

__do_enter_rtas_trace+0x2a0/0x2b4 (unreliable)

rtas_call+0x1f8/0x3e0

enable_ddw.constprop.0+0x4d0/0xc84

dma_iommu_dma_supported+0xe8/0x24c

dma_set_mask+0x5c/0xd8

mlx5_pci_init.constprop.0+0xf0/0x46c [mlx5_core]

probe_one+0xfc/0x32c [mlx5_core]

local_pci_probe+0x68/0x12c

pci_call_probe+0x68/0x1ec

pci_device_probe+0xbc/0x1a8

really_probe+0x104/0x570

__driver_probe_device+0xb8/0x224

driver_probe_device+0x54/0x130

__driver_attach+0x158/0x2b0

bus_for_each_dev+0xa8/0x120

driver_attach+0x34/0x48

bus_add_driver+0x174/0x304

driver_register+0x8c/0x1c4

__pci_register_driver+0x68/0x7c

mlx5_init+0xb8/0x118 [mlx5_core]

do_one_initcall+0x60/0x388

do_init_module+0x7c/0x2a4

init_module_from_file+0xb4/0x108

idempotent_init_module+0x184/0x34c

sys_finit_module+0x90/0x114

And oopses are possible when lockdep is enabled or the RTAS

tracepoints are active, since those paths dereference the result of

the lookup.

Use the correct spelling to match firmware's behavior, adjusting the

related constants to match.