Combine bootm_find_<thing> functions together

bootm_find_ramdisk_fdt() renamed to bootm_find_images() for readability.

The function bootm_find_ramdisk_fdt() appears to be a simple wrapper for
bootm_find_ramdisk(), bootm_find_fdt(), and now bootm_find_loadables().
I didn't see any other callers entering a bootm_find<thing>, so removing
the wrapper, and condensing these together hopefully makes the code a
little simpler.

Signed-off-by: Karl Apsite <Karl.Apsite@dornerworks.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/bootm.h b/include/bootm.h
index 6181488..4981377 100644
--- a/include/bootm.h
+++ b/include/bootm.h
@@ -49,7 +49,7 @@
 ulong bootm_disable_interrupts(void);
 
 /* This is a special function used by booti/bootz */
-int bootm_find_ramdisk_fdt(int flag, int argc, char * const argv[]);
+int bootm_find_images(int flag, int argc, char * const argv[]);
 
 int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 		    int states, bootm_headers_t *images, int boot_progress);