[PATCH 1_4] Merge common get_dev() routines for block devices

Each of the filesystem drivers duplicate the get_dev routine.  This change
merges them into a single function in part.c

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/board/mcc200/auto_update.c b/board/mcc200/auto_update.c
index 12091fd..df003fe 100644
--- a/board/mcc200/auto_update.c
+++ b/board/mcc200/auto_update.c
@@ -23,6 +23,7 @@
 #include <image.h>
 #include <asm/byteorder.h>
 #include <usb.h>
+#include <part.h>
 
 #ifdef CFG_HUSH_PARSER
 #include <hush.h>
@@ -128,8 +129,6 @@
 extern int flash_sect_erase(ulong, ulong);
 extern int flash_sect_protect (int, ulong, ulong);
 extern int flash_write (char *, ulong, ulong);
-/* change char* to void* to shutup the compiler */
-extern block_dev_desc_t *get_dev (char*, int);
 extern int u_boot_hush_start(void);
 
 int au_check_cksum_valid(int idx, long nbytes)