msm_serial: Fix UIM driver configuration

MASK_RX bit is set to prevent transmitted data from looped back.
Set the TX and RX mode to T=0 mode; not T=1 mode.

Change-Id: Ida78fb56cf4b51c0fa88cb57da58c0dcc5db51c9
Acked-by: Ho Lee <holee@qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
diff --git a/drivers/tty/serial/msm_serial.h b/drivers/tty/serial/msm_serial.h
index a769825..34228ec 100644
--- a/drivers/tty/serial/msm_serial.h
+++ b/drivers/tty/serial/msm_serial.h
@@ -108,6 +108,7 @@
 #define UART_SIM_CFG_SIM_CLK_ON		(1 << 7)
 #define UART_SIM_CFG_SIM_CLK_TD8_SEL	(1 << 6)
 #define UART_SIM_CFG_SIM_CLK_STOP_HIGH	(1 << 5)
+#define UART_SIM_CFG_MASK_RX		(1 << 3)
 #define UART_SIM_CFG_SIM_SEL		(1 << 0)
 
 #define UART_MISR_MODE		0x0040