fix(stm32mp2): correct early/crash console init

The former code, using x2 register, was removing the LPEN bit from UART
config register. So the UART clock is stopped as soon as the CA35 is in
CSleep. It was then displaying crap in Linux console.
The ands check instruction is replaced with a clearer tst instruction
directly with the bit to be tested.

Change-Id: I8a2b3ab195981dee2962e0c2f5d501d5933c17f4
Signed-off-by: Yann Gautier <yann.gautier@st.com>
1 file changed