serial: fsl_lpuart: Fix comment typo

The double `as' is duplicated in the comment, remove one.
Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Link: https://lore.kernel.org/r/20220803104208.4127-1-wangborong@cdjrlc.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/fsl_lpuart.c

@@ -2798,7 +2798,7 @@ static int __maybe_unused lpuart_suspend(struct device *dev)
 		 * EDMA driver during suspend will forcefully release any
 		 * non-idle DMA channels. If port wakeup is enabled or if port
 		 * is console port or 'no_console_suspend' is set the Rx DMA
-		 * cannot resume as as expected, hence gracefully release the
+		 * cannot resume as expected, hence gracefully release the
 		 * Rx DMA path before suspend and start Rx DMA path on resume.
 		 */
 		if (irq_wake) {