IB/cache: avoid kernel-doc warnings

IB/cache: avoid kernel-doc warnings

Use the correct function parameters names to eliminate kernel-doc
warnings:

Warning: include/rdma/ib_cache.h:47 function parameter 'device_handle'
 not described in 'ib_get_cached_pkey'
Warning: include/rdma/ib_cache.h:89 function parameter 'port_active'
 not described in 'ib_get_cached_port_state'

(not adding missing function return value descriptions)

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://patch.msgid.link/20260224003106.3172916-1-rdunlap@infradead.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>