Flush the FIFO before switching to runtime. This is so that there are
no lingering chars in the FIFO when we move to the runtime console.
TF-A plans to refactor the console_Switch_state(CONSOLE_FLAG_RUNTIME)
and console_flush() calls and make them the last calls in bl31_main()
(before BL31 exits). Until then they are being left as the last calls
in bl31_plat_runtime_setup() for testing before refactoring.
This patch affects the Freescale/NXP SoCs imx93, imx8qm and imx8qx.
Change-Id: Iece74579e1d15eeeb8279db0c53d74bce45545bd
Signed-off-by: Salman Nabi <salman.nabi@arm.com>
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