[new uImage] Add new uImage format support to arch specific do_bootm_linux() routines

This patch updates architecture specific implementations of
do_bootm_linux() adding new uImage format handling for
operations like get kernel entry point address, get kernel
image data start address.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
index 4d8ef35..86e104c 100644
--- a/lib_ppc/bootm.c
+++ b/lib_ppc/bootm.c
@@ -150,8 +150,12 @@
 		ep = image_get_ep (images->legacy_hdr_os);
 #if defined(CONFIG_FIT)
 	} else if (images->fit_uname_os) {
-		fit_unsupported_reset ("PPC linux bootm");
-		goto error;
+		ret = fit_image_get_entry (images->fit_hdr_os,
+				images->fit_noffset_os, &ep);
+		if (ret) {
+			puts ("Can't get entry point property!\n");
+			goto error;
+		}
 #endif
 	} else {
 		puts ("Could not find kernel entry point!\n");