Kconfigs: layerscape: use a convenient default value for SYS_MALLOC_F_LEN

The default value of CONFIG_SYS_MALLOC_F_LEN (0x400)
leaves U-Boot with not enough memory to load i2c driver
before relocate, causing it to hang.

Change the default value of CONFIG_SYS_MALLOC_F_LEN
for below SoCs,
- LS1012A
- LS1021A
- LS1043A
- LS1046A

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

Kconfig

@@ -147,7 +147,9 @@ config SYS_MALLOC_F_LEN
 	default 0x1000 if AM33XX
 	default 0x2800 if SANDBOX
 	default 0x2000 if (ARCH_IMX8 || ARCH_IMX8M || ARCH_MX7 || \
-			   ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5)
+			   ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5 || \
+			   ARCH_LS1012A || ARCH_LS1021A || ARCH_LS1043A || \
+			   ARCH_LS1046A)
 	default 0x400
 	help
 	  Before relocation, memory is very limited on many platforms. Still,