board: stih410-b2260: remove fdt_high and initrd_high

Remove fdt_high and initrd_high as they shouldn't be used,
this allows the fdt and initrd relocation.
This implies to set CONFIG_SYS_BOOTMAPSZ to indicate the
amount of memory available to contain kernel, device tree
and initrd for relocation.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Patrick DELAUNAY <patrick.delaunay@st.com>

include/configs/stih410-b2260.h

@@ -19,6 +19,12 @@
 
 /* Environment */
 
+/*
+ * For booting Linux, use the first 256 MB of memory, since this is
+ * the maximum mapped by the Linux kernel during initialization.
+ */
+#define CONFIG_SYS_BOOTMAPSZ		SZ_256M
+
 #define CONFIG_LOADADDR			CONFIG_SYS_LOAD_ADDR
 #define CONFIG_SYS_BOOTM_LEN		SZ_16M
 
@@ -34,8 +40,6 @@
 			"fdt_addr_r=0x47000000\0"		\
 			"scriptaddr=0x50000000\0"		\
 			"pxefile_addr_r=0x50100000\0"		\
-			"fdt_high=0xffffffffffffffff\0"		\
-			"initrd_high=0xffffffffffffffff\0"	\
 			"ramdisk_addr_r=0x48000000\0"		\
 			BOOTENV