ima: Fix function name error in comment.

The original function name was ima_path_check().  The policy parsing
still supports PATH_CHECK.   Commit 9bbb6ca ("ima: rename
ima_path_check to ima_file_check") renamed the function to
ima_file_check(), but missed modifying the function name in the
comment.

Fixes: 9bbb6ca ("ima: rename ima_path_check to ima_file_check").

Signed-off-by: Jiele Zhao <unclexiaole@gmail.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

security/integrity/ima/ima_main.c

@@ -482,7 +482,7 @@ int ima_bprm_check(struct linux_binprm *bprm)
 }
 
 /**
- * ima_path_check - based on policy, collect/store measurement.
+ * ima_file_check - based on policy, collect/store measurement.
  * @file: pointer to the file to be measured
  * @mask: contains MAY_READ, MAY_WRITE, MAY_EXEC or MAY_APPEND
  *