Blackfin arch: fix bug - shared lib function in L2 failed be called

Allow user space to access L2 SRAM.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/mm/sram-alloc.c

@@ -183,10 +183,10 @@ static void __init l2_sram_init(void)
 		return;
 	}
 
-	free_l2_sram_head.next->paddr = (void *)L2_START +
-		(_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
-	free_l2_sram_head.next->size = L2_LENGTH -
-		(_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
+	free_l2_sram_head.next->paddr =
+		(void *)L2_START + (_ebss_l2 - _stext_l2);
+	free_l2_sram_head.next->size =
+		L2_LENGTH - (_ebss_l2 - _stext_l2);
 	free_l2_sram_head.next->pid = 0;
 	free_l2_sram_head.next->next = NULL;