IMA: include the word IMA in printk messages

As an example IMA emits a warning when it can't find a TPM chip:

"No TPM chip found, activating TPM-bypass!"

This patch prefaces that message with IMA so we know what subsystem is
bypassing the TPM.  Do this for all pr_info and pr_err messages.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

security/integrity/ima/ima_queue.c

@@ -70,7 +70,7 @@ static int ima_add_digest_entry(struct ima_template_entry *entry)
 
 	qe = kmalloc(sizeof(*qe), GFP_KERNEL);
 	if (qe == NULL) {
-		pr_err("OUT OF MEMORY ERROR creating queue entry.\n");
+		pr_err("IMA: OUT OF MEMORY ERROR creating queue entry.\n");
 		return -ENOMEM;
 	}
 	qe->entry = entry;
@@ -93,7 +93,7 @@ static int ima_pcr_extend(const u8 *hash)
 
 	result = tpm_pcr_extend(TPM_ANY_NUM, CONFIG_IMA_MEASURE_PCR_IDX, hash);
 	if (result != 0)
-		pr_err("Error Communicating to TPM chip\n");
+		pr_err("IMA: Error Communicating to TPM chip\n");
 	return result;
 }