[PATCH RESEND] wifi: ath12k: fix SPT vaddr handling on big endian systems

[Baochen Qiang]

On 6/29/2026 3:56 PM, Alexander Wilhelm wrote:
> SPT pages store descriptor addresses in their vaddr field as little endian
> 64 bit values. Treating these entries as native pointers produces invalid
> addresses on big endian systems.
> 
> Convert vaddr to __le64 and update all access paths. Write descriptor
> addresses as endian annotated 64 bit values and load them by converting
> back to native pointers. Return __le64* instead of void* from the SPT
> lookup and translate the stored value in the descriptor getters.
> 
> This ensures correct and consistent handling of descriptor addresses on big
> endian systems, while little endian systems remain unaffected.
> 
> Signed-off-by: Alexander Wilhelm <alexander.wilhelm at westermo.com>

Reviewed-by: Baochen Qiang <baochen.qiang at oss.qualcomm.com>