Commit c24d1d96 ("sysinfo: adapt script after removal of deprecated fsl_otp
driver") introduced a mistake masking the SEC_CONFIG[1] bit read from the OTP.
This commit fix the read command to force it in hex format and finally match
with the mask in the script.
https://jira.digi.com/browse/DEL-7263
Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>