stm32mp1: keep console during runtime
stm32mp1: keep console during runtime

The runtime console is only kept in DEBUG configuration.

Change-Id: I0447dfcacb9a63a12bcdab7c55584d70c3220e5b
Signed-off-by: Yann Gautier <e753f6969c288905606e3c07464886d4f1fc1be0@st.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware