board_init_r: Removed unused cmdtp variable

Follow up to commit 620f1f6a64095ed558e68d37f1965d015cd49b02
removed compiler warning for (now) unused cmd_tbl_t* cmdtp
diff --git a/arch/avr32/lib/board.c b/arch/avr32/lib/board.c
index e6b81cc..96ccc7f 100644
--- a/arch/avr32/lib/board.c
+++ b/arch/avr32/lib/board.c
@@ -257,7 +257,6 @@
 	extern char * env_name_spec;
 #endif
 	char *s;
-	cmd_tbl_t *cmdtp;
 	bd_t *bd;
 
 	gd = new_gd;
diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c
index eba2435..4541e24 100644
--- a/arch/m68k/lib/board.c
+++ b/arch/m68k/lib/board.c
@@ -393,7 +393,6 @@
  */
 void board_init_r (gd_t *id, ulong dest_addr)
 {
-	cmd_tbl_t *cmdtp;
 	char *s;
 	bd_t *bd;
 	extern void malloc_bin_reloc (void);
diff --git a/arch/mips/lib/board.c b/arch/mips/lib/board.c
index 0044b19..4a22f7b 100644
--- a/arch/mips/lib/board.c
+++ b/arch/mips/lib/board.c
@@ -276,7 +276,6 @@
 
 void board_init_r (gd_t *id, ulong dest_addr)
 {
-	cmd_tbl_t *cmdtp;
 #ifndef CONFIG_SYS_NO_FLASH
 	ulong size;
 #endif