ext4: Allow reading files with non-zero offset, clamp read len

Support was already implemented, but not hooked up. This fixes several
fails in the test cases.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
diff --git a/common/spl/spl_ext.c b/common/spl/spl_ext.c
index b93e1ea..1b8e15e 100644
--- a/common/spl/spl_ext.c
+++ b/common/spl/spl_ext.c
@@ -42,7 +42,7 @@
 		puts("spl: ext4fs_open failed\n");
 		goto end;
 	}
-	err = ext4fs_read((char *)header, sizeof(struct image_header), &actlen);
+	err = ext4fs_read((char *)header, 0, sizeof(struct image_header), &actlen);
 	if (err < 0) {
 		puts("spl: ext4fs_read failed\n");
 		goto end;
@@ -54,7 +54,7 @@
 		goto end;
 	}
 
-	err = ext4fs_read((char *)spl_image->load_addr, filelen, &actlen);
+	err = ext4fs_read((char *)spl_image->load_addr, 0, filelen, &actlen);
 
 end:
 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
@@ -97,7 +97,7 @@
 			puts("spl: ext4fs_open failed\n");
 			goto defaults;
 		}
-		err = ext4fs_read((void *)CONFIG_SYS_SPL_ARGS_ADDR, filelen, &actlen);
+		err = ext4fs_read((void *)CONFIG_SYS_SPL_ARGS_ADDR, 0, filelen, &actlen);
 		if (err < 0) {
 			printf("spl: error reading image %s, err - %d, falling back to default\n",
 			       file, err);
@@ -127,7 +127,7 @@
 	if (err < 0)
 		puts("spl: ext4fs_open failed\n");
 
-	err = ext4fs_read((void *)CONFIG_SYS_SPL_ARGS_ADDR, filelen, &actlen);
+	err = ext4fs_read((void *)CONFIG_SYS_SPL_ARGS_ADDR, 0, filelen, &actlen);
 	if (err < 0) {
 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 		printf("%s: error reading image %s, err - %d\n",