ppc64: initramfs fixes

arch/ppc64/Makefile

@@ -16,6 +16,7 @@
 KERNELLOAD	=0xc000000000000000
 
 LDFLAGS		:= -m elf64ppc
+ARCHBLOBLFLAGS	:= -I binary -O elf64-powerpc -B powerpc
 LDFLAGS_vmlinux	= -Bstatic \
 		-e $(KERNELLOAD) -Ttext $(KERNELLOAD)
 CFLAGS		:= $(CFLAGS) -msoft-float -pipe \

arch/ppc64/vmlinux.lds.S

@@ -102,6 +102,10 @@ SECTIONS
 	*(.initcall7.init)
   }
   __initcall_end = .;
+  . = ALIGN(4096);
+  __initramfs_start = .;
+  .init.ramfs : { *(.init.initramfs) }
+  __initramfs_end = .;
   . = ALIGN(32);
   __per_cpu_start = .;
   .data.percpu  : { *(.data.percpu) }