fsl_mfgprot: Fix typo in sign_mppubk()

The signature is generated using manufacturing protection private key.

Fix typo in fsl_mfgprot.c.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/crypto/fsl/fsl_mfgprot.c b/drivers/crypto/fsl/fsl_mfgprot.c
index fa874e7..29af79f 100644
--- a/drivers/crypto/fsl/fsl_mfgprot.c
+++ b/drivers/crypto/fsl/fsl_mfgprot.c
@@ -138,7 +138,7 @@
 	flush_dcache_range((unsigned long)d, (unsigned long)d + size);
 
 	/* Execute Job Descriptor */
-	puts("\nSigning message with Manufacturing Protection Public Key\n");
+	puts("\nSigning message with Manufacturing Protection Private Key\n");
 
 	ret = run_descriptor_jr(dsc);
 	if (ret) {