Merge branch 'net-use-vmalloc_array-to-simplify-code'

Qianfeng Rong says:

====================
net: use vmalloc_array() to simplify code

Remove array_size() calls and replace vmalloc() with vmalloc_array() to
simplify the code and maintain consistency with existing kmalloc_array()
usage.

vmalloc_array() is also optimized better, resulting in less instructions
being used [1].

[1]: https://lore.kernel.org/lkml/abc66ec5-85a4-47e1-9759-2f60ab111971@vivo.com/
====================

Link: https://patch.msgid.link/20250816090659.117699-1-rongqianfeng@vivo.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>