spl: Remove some #ifdefs in spl_parse_image_header()

This function has a number of unnecessary #ifdefs so remove them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 028cba9..f32e621 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -308,8 +308,10 @@
 		ret = spl_parse_legacy_header(spl_image, header);
 		if (ret)
 			return ret;
-	} else {
-#ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
+		return 0;
+	}
+
+	if (IS_ENABLED(CONFIG_SPL_PANIC_ON_RAW_IMAGE)) {
 		/*
 		 * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
 		 * code which loads images in SPL cannot guarantee that
@@ -319,10 +321,9 @@
 		 * is bad, and thus should be skipped silently.
 		 */
 		panic("** no mkimage signature but raw image not supported");
-#endif
+	}
 
-#if CONFIG_IS_ENABLED(OS_BOOT)
-#if defined(CONFIG_CMD_BOOTI)
+	if (CONFIG_IS_ENABLED(OS_BOOT) && IS_ENABLED(CONFIG_CMD_BOOTI)) {
 		ulong start, size;
 
 		if (!booti_setup((ulong)header, &start, &size, 0)) {
@@ -336,7 +337,7 @@
 			      spl_image->load_addr, spl_image->size);
 			return 0;
 		}
-#elif defined(CONFIG_CMD_BOOTZ)
+	} else if (CONFIG_IS_ENABLED(OS_BOOT) && IS_ENABLED(CONFIG_CMD_BOOTZ)) {
 		ulong start, end;
 
 		if (!bootz_setup((ulong)header, &start, &end)) {
@@ -350,11 +351,11 @@
 			      spl_image->load_addr, spl_image->size);
 			return 0;
 		}
-#endif
-#endif
+	}
 
-		if (!spl_parse_board_header(spl_image, bootdev, (const void *)header, sizeof(*header)))
-			return 0;
+	if (!spl_parse_board_header(spl_image, bootdev, (const void *)header,
+				    sizeof(*header)))
+		return 0;
 
 #ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
 		/* Signature not found - assume u-boot.bin */
@@ -366,7 +367,6 @@
 		debug("Raw boot image support not enabled, proceeding to other boot methods\n");
 		return -EINVAL;
 #endif
-	}
 
 	return 0;
 }