arm: mach-k3: security: Lower verbosity of cert message for GP

When we find a certificate on an image to be booted on a GP device we
print out a message explaining that the certificate is being skipped.
This message is rather long and is printed for every image. Shorten
the message and make the long version into a debug message.

Signed-off-by: Andrew Davis <afd@ti.com>
Tested-by: Jonathan Humphreys <j-humphreys@ti.com>
diff --git a/arch/arm/mach-k3/security.c b/arch/arm/mach-k3/security.c
index 22697a2..7c46914 100644
--- a/arch/arm/mach-k3/security.c
+++ b/arch/arm/mach-k3/security.c
@@ -50,7 +50,7 @@
 
 	if (get_device_type() == K3_DEVICE_TYPE_GP) {
 		if (ti_secure_cert_detected(*p_image)) {
-			printf("Warning: Detected image signing certificate on GP device. "
+			debug("Warning: Detected image signing certificate on GP device. "
 			       "Skipping certificate to prevent boot failure. "
 			       "This will fail if the image was also encrypted\n");
 
@@ -60,6 +60,7 @@
 				return;
 			}
 
+			printf("Skipping authentication on GP device\n");
 			*p_image += cert_length;
 			*p_size -= cert_length;
 		}