configs: ls1012a: Increase CONFIG_SYS_MALLOC_LEN size

CONFIG_SYS_MALLOC_LEN is currently set to low value and leaves very less
space to do malloc in flash environmet. Increase the value to get more
memory and also make it align with other boards(ls1046a, ls1043a etc.)
config values.
Signed-off-by: NKuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: NPriyanka Jain <priyanka.jain@nxp.com>

include/configs/ls1012a_common.h

@@ -34,7 +34,7 @@
 #define CONFIG_LAYERSCAPE_NS_ACCESS
 
 /* Size of malloc() pool */
-#define CONFIG_SYS_MALLOC_LEN		(CONFIG_ENV_SIZE + 128 * 1024)
+#define CONFIG_SYS_MALLOC_LEN		(CONFIG_ENV_SIZE + 1024 * 1024)
 
 /*SPI device */
 #define CONFIG_SYS_FMAN_FW_ADDR		0x400d0000