MLK-20916-1: doc: imx: habv4: Fix typo in iMX6 and iMX7 encrypted boot guide

The set_priblob_bitfield command is enabled by selecting
CONFIG_CMD_PRIBLOB.

Fix typo in mx6_mx7_encrypted_boot.txt guide.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
(cherry picked from commit 99f9696ef5f7d1c0f93b7d910e884890fca6c973)
diff --git a/doc/imx/habv4/guides/mx6_mx7_encrypted_boot.txt b/doc/imx/habv4/guides/mx6_mx7_encrypted_boot.txt
index d3f71b0..137d499 100644
--- a/doc/imx/habv4/guides/mx6_mx7_encrypted_boot.txt
+++ b/doc/imx/habv4/guides/mx6_mx7_encrypted_boot.txt
@@ -21,7 +21,7 @@
 
   CONFIG_FAT_WRITE=y
   CONFIG_CMD_DEKBLOB=y
-  CONFIG_CDM_PRIBLOB=y
+  CONFIG_CMD_PRIBLOB=y
 
 - Kconfig