docs(st): introduce STM32MP_RECONFIGURE_CONSOLE

This flag will be used in BL32, to reconfigure UART parameters for
the early or crash console. By default, it is zero, as UART is
already configured in BL2.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: I7b28ff489479ab04a2fade027933524cdd36e959
diff --git a/docs/plat/stm32mp1.rst b/docs/plat/stm32mp1.rst
index be86ae4..fff86a8 100644
--- a/docs/plat/stm32mp1.rst
+++ b/docs/plat/stm32mp1.rst
@@ -148,6 +148,8 @@
   | default location (end of the first 128MB) is used when absent
 - | ``STM32MP_EARLY_CONSOLE``: to enable early traces before clock driver is setup.
   | Default: 0 (disabled)
+- | ``STM32MP_RECONFIGURE_CONSOLE``: to re-configure crash console (especially after BL2).
+  | Default: 0 (disabled)
 - | ``STM32MP_UART_BAUDRATE``: to select UART baud rate.
   | Default: 115200
 - | ``STM32_TF_VERSION``: to manage BL2 monotonic counter.