cmd_bmp.c: message about compressed formats is debug info only.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Anatolij Gustschin <agust@denx.de>

common/cmd_bmp.c

@@ -79,7 +79,7 @@ bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
 		return NULL;
 	}
 
-	puts("Gzipped BMP image detected!\n");
+	debug("Gzipped BMP image detected!\n");
 
 	return bmp;
 }