[new uImage] Use show_boot_progress() for new uImage format

This patch allocates a set of show_boot_progress() IDs for new uImage format
and adds show_boot_progress() calls in new uImage format handling code.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 9a168ea..7b1f830 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -528,9 +528,11 @@
 	case IMAGE_FORMAT_FIT:
 		fit_hdr = (const void *)addr;
 		if (!fit_check_format (fit_hdr)) {
+			show_boot_progress (-150);
 			puts ("** Bad FIT image format\n");
 			return 1;
 		}
+		show_boot_progress (151);
 		puts ("Fit image detected...\n");
 
 		cnt = fit_get_size (fit_hdr);
@@ -1020,9 +1022,11 @@
 	case IMAGE_FORMAT_FIT:
 		fit_hdr = (const void *)addr;
 		if (!fit_check_format (fit_hdr)) {
+			show_boot_progress (-150);
 			puts ("** Bad FIT image format\n");
 			return 1;
 		}
+		show_boot_progress (151);
 		puts ("Fit image detected...\n");
 
 		cnt = fit_get_size (fit_hdr);