[secure boot]fix conflict

installer/default_platform.conf

@@ -577,13 +577,13 @@ menuentry '$demo_grub_entry' {
         if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
         insmod part_msdos
         insmod ext2
-        linux   /$image_dir/boot/vmlinuz-5.10.0-18-2-amd64 root=$grub_cfg_root rw $GRUB_CMDLINE_LINUX  \
+        $GRUB_CFG_LINUX_CMD   /$image_dir/boot/vmlinuz-5.10.0-18-2-amd64 root=$grub_cfg_root rw $GRUB_CMDLINE_LINUX  \
                 net.ifnames=0 biosdevname=0 \
                 loop=$image_dir/$FILESYSTEM_SQUASHFS loopfstype=squashfs                       \
                 systemd.unified_cgroup_hierarchy=0 \
                 apparmor=1 security=apparmor varlog_size=$VAR_LOG_SIZE usbcore.autosuspend=-1 $ONIE_PLATFORM_EXTRA_CMDLINE_LINUX
         echo    'Loading $demo_volume_label $demo_type initial ramdisk ...'
-        initrd  /$image_dir/boot/initrd.img-5.10.0-18-2-amd64
+        $GRUB_CFG_INITRD_CMD  /$image_dir/boot/initrd.img-5.10.0-18-2-amd64
 }
 EOF
 
@@ -606,6 +606,17 @@ EOF
         cp $grub_cfg $onie_initrd_tmp/$demo_mnt/grub/grub.cfg
     fi
 
+    if [ "$secure_boot_state" = "SecureBoot enabled" ]; then
+        # Secure Boot grub.cfg support
+        # Saving grub_cfg in the same place where is grubx64.efi, 
+        # this grub_cfg file will be called by first grub.cfg file from: /boot/efi/EFI/debian/grub.cfg
+        if [ -f $NVOS_BOOT_DIR/grub.cfg ]; then
+            rm $NVOS_BOOT_DIR/grub.cfg
+        fi
+
+        cp $grub_cfg $NVOS_BOOT_DIR/grub.cfg
+    fi
+
     cd /
 
     echo "Installed SONiC base image $demo_volume_label successfully"

scripts/signing_secure_boot_dev.sh

@@ -149,4 +149,4 @@ sudo bash scripts/secure_boot_signature_verification.sh -c $PEM_CERT -e ${CURR_V
 #########################
 sudo bash scripts/signing_kernel_modules.sh $LINUX_KERNEL_VERSION ${PEM_CERT} ${PEM_PRIV_KEY}
 
-echo "$0 signing & verifying EFI files and Kernel Modules DONE"
+echo "$0 signing & verifying EFI files and Kernel Modules DONE"