arm: ls102xa: Add LPUART support for LS1021AQDS board

This patch adds LPUART support for LS1021AQDS board.
For ls1021aqds_nor_lpuart_defconfig, LPUART is used as the console.
Signed-off-by: NAlison Wang <alison.wang@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>

board/freescale/ls1021aqds/MAINTAINERS

@@ -6,6 +6,7 @@ F:	include/configs/ls1021aqds.h
 F:	configs/ls1021aqds_nor_defconfig
 F:	configs/ls1021aqds_ddr4_nor_defconfig
 F:	configs/ls1021aqds_nor_SECURE_BOOT_defconfig
+F:	configs/ls1021aqds_nor_lpuart_defconfig
 F:	configs/ls1021aqds_sdcard_defconfig
 F:	configs/ls1021aqds_qspi_defconfig
 F:	configs/ls1021aqds_nand_defconfig

configs/ls1021aqds_nor_lpuart_defconfig

+CONFIG_SYS_EXTRA_OPTIONS="LPUART"
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_LS1021AQDS=y

include/configs/ls1021aqds.h

@@ -365,11 +365,16 @@ unsigned long get_board_ddr_clk(void);
 /*
  * Serial Port
  */
+#ifdef CONFIG_LPUART
+#define CONFIG_FSL_LPUART
+#define CONFIG_LPUART_32B_REG
+#else
 #define CONFIG_CONS_INDEX		1
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	1
 #define CONFIG_SYS_NS16550_CLK		get_serial_clock()
+#endif
 
 #define CONFIG_BAUDRATE			115200
 
@@ -528,11 +533,19 @@ unsigned long get_board_ddr_clk(void);
 
 #define CONFIG_SYS_QE_FW_ADDR     0x67f40000
 
+#ifdef CONFIG_LPUART
+#define CONFIG_EXTRA_ENV_SETTINGS       \
+	"bootargs=root=/dev/ram0 rw console=ttyLP0,115200\0" \
+	"fdt_high=0xcfffffff\0"         \
+	"initrd_high=0xcfffffff\0"      \
+	"hwconfig=fsl_ddr:ctlr_intlv=null,bank_intlv=null\0"
+#else
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 	"bootargs=root=/dev/ram0 rw console=ttyS0,115200\0" \
 	"fdt_high=0xcfffffff\0"		\
 	"initrd_high=0xcfffffff\0"      \
 	"hwconfig=fsl_ddr:ctlr_intlv=null,bank_intlv=null\0"
+#endif
 
 /*
  * Miscellaneous configurable options