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UARTDM hardware doesn't work if data is transferred immediately after programming NO_CHARS_FOR_TX register. Hence read out UART Status Register which introduces one AHB clock cycle delay after programming NO_CHARS_FOR_TX register. Change-Id: I442228e151496eddf1f61c505c15301f5deaf588 Signed-off-by: Mayank Rana <mrana@codeaurora.org>