boards/esp32c3-devkit: Allocate .noinit in a dedicated section

Previously it was being allocated into .bss section after the _ebss
address. Although functional, this is not intuitive.

boards/risc-v/esp32c3/esp32c3-devkit/scripts/esp32c3.ld

@@ -75,12 +75,16 @@ SECTIONS
 
     . = ALIGN (8);
     _ebss = ABSOLUTE(.);
+  } >dram0_0_seg
 
-   /* Uninitialized .bss */
+  .noinit (NOLOAD):
+  {
+    /* This section contains data that is not initialized during load,
+     * or during the application's initialization sequence.
+     */
 
     *(.noinit)
     *(.noinit.*)
-
   } >dram0_0_seg
 
   .dram0.data :