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>
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index 46642a1..acd4226 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -26,7 +26,7 @@
 
 	desc->tfm = crypto_alloc_hash(ima_hash, 0, CRYPTO_ALG_ASYNC);
 	if (IS_ERR(desc->tfm)) {
-		pr_info("failed to load %s transform: %ld\n",
+		pr_info("IMA: failed to load %s transform: %ld\n",
 			ima_hash, PTR_ERR(desc->tfm));
 		rc = PTR_ERR(desc->tfm);
 		return rc;
@@ -111,7 +111,7 @@
 		return;
 
 	if (tpm_pcr_read(TPM_ANY_NUM, idx, pcr) != 0)
-		pr_err("Error Communicating to TPM chip\n");
+		pr_err("IMA: Error Communicating to TPM chip\n");
 }
 
 /*