MA-13239 imx8qm: Touch correct pad for UART0

Due imx8qm_mek's UART0_RTS_B and UART0_CTS_0 pad
reuse to be the UART2 for base bard which operated by
M4_1, so don't touch these two pads in ATF.

Signed-off-by: Haoran.Wang <elven.wang@nxp.com>
Acked-by: Pete Zhang <pete.zhang@nxp.com>

plat/imx/imx8qm/imx8qm_bl31_setup.c

diff --git a/plat/imx/imx8qm/imx8qm_bl31_setup.c b/plat/imx/imx8qm/imx8qm_bl31_setup.c
index 78539b3..4bc8c78 100644
--- a/plat/imx/imx8qm/imx8qm_bl31_setup.c
+++ b/plat/imx/imx8qm/imx8qm_bl31_setup.c
@@ -412,8 +412,7 @@
 	/* configure UART pads */
 	sc_pad_set(ipc_handle, SC_P_UART0_RX, UART_PAD_CTRL);
 	sc_pad_set(ipc_handle, SC_P_UART0_TX, UART_PAD_CTRL);
-	sc_pad_set(ipc_handle, SC_P_UART0_RTS_B, UART_PAD_CTRL);
-	sc_pad_set(ipc_handle, SC_P_UART0_CTS_B, UART_PAD_CTRL);
+
 	lpuart32_serial_init(IMX_BOOT_UART_BASE);
 #endif