nios2: use common sequence for reserve_uboot

Use common sequence for reserve_uboot, as the result is
the same.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
diff --git a/common/board_f.c b/common/board_f.c
index 7632041..94db06d 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -894,7 +894,7 @@
 	 *  - board info struct
 	 */
 	setup_dest_addr,
-#if defined(CONFIG_BLACKFIN) || defined(CONFIG_NIOS2)
+#if defined(CONFIG_BLACKFIN)
 	/* Blackfin u-boot monitor should be on top of the ram */
 	reserve_uboot,
 #endif
@@ -919,7 +919,7 @@
 		!defined(CONFIG_BLACKFIN) && !defined(CONFIG_M68K)
 	reserve_video,
 #endif
-#if !defined(CONFIG_BLACKFIN) && !defined(CONFIG_NIOS2)
+#if !defined(CONFIG_BLACKFIN)
 	reserve_uboot,
 #endif
 #ifndef CONFIG_SPL_BUILD