ima: rename FILE_MMAP to MMAP_CHECK

Rename FILE_MMAP hook to MMAP_CHECK to be consistent with the other
hook names.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 1cd4eb2..970693d 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -228,7 +228,7 @@
 {
 	if (file && (prot & PROT_EXEC))
 		return process_measurement(file, file->f_dentry->d_name.name,
-					   MAY_EXEC, FILE_MMAP);
+					   MAY_EXEC, MMAP_CHECK);
 	return 0;
 }