RISC-V: Move dynamic relocation section under __init

Dynamic relocation section are only required during boot. Those sections
can be freed after init. Thus, it can be moved to __init section.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Tested-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

arch/riscv/kernel/vmlinux.lds.S

@@ -85,6 +85,10 @@ SECTIONS
 	}
 	PERCPU_SECTION(L1_CACHE_BYTES)
 
+	.rel.dyn : {
+		*(.rel.dyn*)
+	}
+
 	__init_data_end = .;
 	__init_end = .;
 
@@ -116,10 +120,6 @@ SECTIONS
 
 	BSS_SECTION(PAGE_SIZE, PAGE_SIZE, 0)
 
-	.rel.dyn : {
-		*(.rel.dyn*)
-	}
-
 #ifdef CONFIG_EFI
 	. = ALIGN(PECOFF_SECTION_ALIGNMENT);
 	__pecoff_data_virt_size = ABSOLUTE(. - __pecoff_text_end);