x86/usercopy: Fix kernel-doc func param name in clean_cache_range()'s description

Use @addr instead of @vaddr in the kernel-doc comment for
clean_cache_range() to eliminate warnings:

  arch/x86/lib/usercopy_64.c:29: warning: Function parameter or struct member 'addr' not described in 'clean_cache_range'
  arch/x86/lib/usercopy_64.c:29: warning: Excess function parameter 'vaddr' description in 'clean_cache_range'

Fixes: 0aed55af ("x86, uaccess: introduce copy_from_iter_flushcache for pmem / cache-bypass operations")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20250111063333.911084-1-rdunlap@infradead.org