bsps/riscv: Sort .noinit* sections

Sort the .noinit* input sections by name first, then by alignment if two
sections have the same name.  This allows the placement of begin/end symbols to
initialize some areas with a special value.

Update #4678.

spec/build/bsps/riscv/linkcmdsbase.yml

@@ -319,7 +319,7 @@ content: |
 
     .noinit (NOLOAD) : ${LINKCMDS_ALIGN_DIRECTIVE} {
       bsp_section_noinit_begin = .;
-      *(.noinit*)
+      *(SORT_BY_NAME (SORT_BY_ALIGNMENT (.noinit*)))
       bsp_section_noinit_end = .;
     } > REGION_WORK AT > REGION_WORK
     bsp_section_noinit_size = bsp_section_noinit_end - bsp_section_noinit_begin;