microblaze: spl: Add LISTS to linker script

This is required for driver model.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/cpu/u-boot-spl.lds

@@ -37,6 +37,12 @@ SECTIONS
 		__data_end = .;
 	}
 
+	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	}
+	__init_end = . ;
+
 	.bss ALIGN(0x4):
 	{
 		__bss_start = .;