virt: sev-guest: Fix user-visible strings

User-visible abbreviations should be in capitals, ensure messages are
readable and clear.

No functional change.
Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240731150811.156771-4-nikunj@amd.com

drivers/virt/coco/sev-guest/sev-guest.c

@@ -114,7 +114,7 @@ static bool is_vmpck_empty(struct snp_guest_dev *snp_dev)
  */
 static void snp_disable_vmpck(struct snp_guest_dev *snp_dev)
 {
-	dev_alert(snp_dev->dev, "Disabling vmpck_id %d to prevent IV reuse.\n",
+	dev_alert(snp_dev->dev, "Disabling VMPCK%d communication key to prevent IV reuse.\n",
 		  vmpck_id);
 	memzero_explicit(snp_dev->vmpck, VMPCK_KEY_LEN);
 	snp_dev->vmpck = NULL;
@@ -1117,13 +1117,13 @@ static int __init sev_guest_probe(struct platform_device *pdev)
 	ret = -EINVAL;
 	snp_dev->vmpck = get_vmpck(vmpck_id, secrets, &snp_dev->os_area_msg_seqno);
 	if (!snp_dev->vmpck) {
-		dev_err(dev, "invalid vmpck id %d\n", vmpck_id);
+		dev_err(dev, "Invalid VMPCK%d communication key\n", vmpck_id);
 		goto e_unmap;
 	}
 
 	/* Verify that VMPCK is not zero. */
 	if (is_vmpck_empty(snp_dev)) {
-		dev_err(dev, "vmpck id %d is null\n", vmpck_id);
+		dev_err(dev, "Empty VMPCK%d communication key\n", vmpck_id);
 		goto e_unmap;
 	}
 
@@ -1174,7 +1174,7 @@ static int __init sev_guest_probe(struct platform_device *pdev)
 	if (ret)
 		goto e_free_cert_data;
 
-	dev_info(dev, "Initialized SEV guest driver (using vmpck_id %d)\n", vmpck_id);
+	dev_info(dev, "Initialized SEV guest driver (using VMPCK%d communication key)\n", vmpck_id);
 	return 0;
 
 e_free_cert_data: