ima: Fix documentation-related warnings in ima_main.c

Fix the following warnings in ima_main.c, displayed with W=n make argument:

security/integrity/ima/ima_main.c:432: warning: Function parameter or
                          member 'vma' not described in 'ima_file_mprotect'
security/integrity/ima/ima_main.c:636: warning: Function parameter or
                  member 'inode' not described in 'ima_post_create_tmpfile'
security/integrity/ima/ima_main.c:636: warning: Excess function parameter
                            'file' description in 'ima_post_create_tmpfile'
security/integrity/ima/ima_main.c:843: warning: Function parameter or
                     member 'load_id' not described in 'ima_post_load_data'
security/integrity/ima/ima_main.c:843: warning: Excess function parameter
                                   'id' description in 'ima_post_load_data'

Also, fix some style issues in the description of ima_post_create_tmpfile()
and ima_post_path_mknod().
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Link: https://lore.kernel.org/bpf/20220302111404.193900-2-roberto.sassu@huawei.com

security/integrity/ima/ima_main.c

@@ -418,6 +418,7 @@ int ima_file_mmap(struct file *file, unsigned long prot)
 
 /**
  * ima_file_mprotect - based on policy, limit mprotect change
+ * @vma: vm_area_struct protection is set to
  * @prot: contains the protection that will be applied by the kernel.
  *
  * Files can be mmap'ed read/write and later changed to execute to circumvent
@@ -611,7 +612,7 @@ EXPORT_SYMBOL_GPL(ima_inode_hash);
 /**
  * ima_post_create_tmpfile - mark newly created tmpfile as new
  * @mnt_userns: user namespace of the mount the inode was found from
- * @file : newly created tmpfile
+ * @inode: inode of the newly created tmpfile
  *
  * No measuring, appraising or auditing of newly created tmpfiles is needed.
  * Skip calling process_measurement(), but indicate which newly, created
@@ -814,8 +815,8 @@ int ima_load_data(enum kernel_load_data_id id, bool contents)
  * ima_post_load_data - appraise decision based on policy
  * @buf: pointer to in memory file contents
  * @size: size of in memory file contents
- * @id: kernel load data caller identifier
- * @description: @id-specific description of contents
+ * @load_id: kernel load data caller identifier
+ * @description: @load_id-specific description of contents
  *
  * Measure/appraise/audit in memory buffer based on policy.  Policy rules
  * are written in terms of a policy identifier.