ARM: fix stack pointer adjustment in board_init_f()

Since addr_sp is a byte address, it should be adjusted by 12 here.
Signed-off-by: NEric Cooper <ecc@cmu.edu>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: NWolfgang Denk <wd@denx.de>

arch/arm/lib/board.c

@@ -399,7 +399,7 @@ void board_init_f (ulong bootflag)
 		CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ, addr_sp);
 #endif
 	/* leave 3 words for abort-stack    */
-	addr_sp -= 3;
+	addr_sp -= 12;
 
 	/* 8-byte alignment for ABI compliance */
 	addr_sp &= ~0x07;