bootm: refactor entry point code

Move entry point code out of each arch and into common code.
Keep the entry point in the bootm_headers_t images struct.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/lib_arm/bootm.c b/lib_arm/bootm.c
index 955a1ae..5660a50 100644
--- a/lib_arm/bootm.c
+++ b/lib_arm/bootm.c
@@ -62,7 +62,6 @@
 		     bootm_headers_t *images)
 {
 	ulong	initrd_start, initrd_end;
-	ulong	ep = 0;
 	bd_t	*bd = gd->bd;
 	char	*s;
 	int	machid = bd->bi_arch_number;
@@ -73,23 +72,7 @@
 	char *commandline = getenv ("bootargs");
 #endif
 
-	/* find kernel entry point */
-	if (images->legacy_hdr_valid) {
-		ep = image_get_ep (&images->legacy_hdr_os_copy);
-#if defined(CONFIG_FIT)
-	} else if (images->fit_uname_os) {
-		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");
-		goto error;
-	}
-	theKernel = (void (*)(int, int, uint))ep;
+	theKernel = (void (*)(int, int, uint))images->ep;
 
 	s = getenv ("machid");
 	if (s) {