ARMv8/ls1046a: Cleanup the environment variables

Cleanup the variables: "kernel_addr","ramdisk_addr",
"ramdisk_size","console".

Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

include/configs/ls1043a_common.h

@@ -245,15 +245,12 @@
 #define CONFIG_EXTRA_ENV_SETTINGS		\
 	"hwconfig=fsl_ddr:bank_intlv=auto\0"	\
 	"loadaddr=0x80100000\0"			\
-	"kernel_addr=0x100000\0"		\
-	"ramdisk_addr=0x800000\0"		\
-	"ramdisk_size=0x2000000\0"		\
 	"fdt_high=0xffffffffffffffff\0"		\
 	"initrd_high=0xffffffffffffffff\0"	\
 	"kernel_start=0x61100000\0"		\
 	"kernel_load=0xa0000000\0"		\
 	"kernel_size=0x2800000\0"		\
-	"console=ttyAMA0,38400n8\0"
+	"console=ttyS0,115200\0"
 
 #define CONFIG_BOOTARGS			"console=ttyS0,115200 root=/dev/ram0 " \
 					"earlycon=uart8250,mmio,0x21c0500"