stm32mp1: Add usb device id from otp

Read uid from OTP to generate an uniq usb device id for dfu identification

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Reviewed-on: https://gerrit.st.com/81294
Change-Id: I75000bc75cea68c293ea77aa51bdf1e2b181e966
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/tf-a/+/177376


Reviewed-by: CITOOLS <smet-aci-reviews@lists.codex.cro.st.com>
Reviewed-by: Yann GAUTIER <yann.gautier@st.com>
Tested-by: Yann GAUTIER <yann.gautier@st.com>