The recent introduction of relocatable kernels prepared the move of
.rela.dyn to the init section, but actually forgot to do so, so do it
here.
Before this patch: "Freeing unused kernel image (initmem) memory: 2592K"
After this patch:  "Freeing unused kernel image (initmem) memory: 6288K"
The difference corresponds to the size of the .rela.dyn section:
"[42] .rela.dyn         RELA             
ffffffff8197e798  0127f798
       000000000039c660  0000000000000018   A      47     0     8"
Fixes: 559d1e45a16d ("riscv: Use --emit-relocs in order to move .rela.dyn in init")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230428120932.22735-1-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
                *(.rel.dyn*)
        }
 
+       .rela.dyn : ALIGN(8) {
+               __rela_dyn_start = .;
+               *(.rela .rela*)
+               __rela_dyn_end = .;
+       }
+
        __init_data_end = .;
 
        . = ALIGN(8);
                *(.sdata*)
        }
 
-       .rela.dyn : ALIGN(8) {
-               __rela_dyn_start = .;
-               *(.rela .rela*)
-               __rela_dyn_end = .;
-       }
-
        .got : { *(.got*) }
 
 #ifdef CONFIG_RELOCATABLE