armv7-a/r: use _ebss as idle stack both in SMP mode or not

this commit fix:
7d45afe871

which in PR:
https://github.com/apache/nuttx/pull/11814

Signed-off-by: ligd <liguiding1@xiaomi.com>

boards/arm/a1x/pcduino-a10/scripts/sdram.ld

@@ -83,6 +83,15 @@ SECTIONS
         _edata = ABSOLUTE(.);
     } > sdram
 
+    /* Uninitialized data */
+
+    .noinit :
+    {
+        _snoinit = ABSOLUTE(.);
+        *(.noinit*)
+        _enoinit = ABSOLUTE(.);
+    } > sdram
+
     .bss :
     {
         _sbss = ABSOLUTE(.);
@@ -93,15 +102,6 @@ SECTIONS
         _ebss = ABSOLUTE(.);
     } > sdram
 
-    /* Uninitialized data */
-
-    .noinit :
-    {
-        _snoinit = ABSOLUTE(.);
-        *(.noinit*)
-        _enoinit = ABSOLUTE(.);
-    } > sdram
-
     /* Stabs debugging sections. */
 
     .stab 0 : { *(.stab) }