locking/barrier: Use correct parameter names

locking/barrier: Use correct parameter names

Use the correct parameter names in kernel-doc comments to avoid
warnings:

Warning: include/asm-generic/barrier.h:245 function parameter 'cond_expr'
 not described in 'smp_cond_load_relaxed'
Warning: include/asm-generic/barrier.h:267 function parameter 'cond_expr'
 not described in 'smp_cond_load_acquire'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260430233927.2620050-1-rdunlap@infradead.org