tci: Fix broken build (compiler warning caused by redefined macro BIT)

The definition of macro BIT in tci/tcg-target.c now conflicts with the
definition of the same macro in includes qemu/bitops.h.

This conflict was triggered by a recent change in the include chain of
tcg.c (probably commit 949fc823).
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Message-id: 1375216883-23969-1-git-send-email-sw@weilnetz.de
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

tcg/tci/tcg-target.c

@@ -34,9 +34,6 @@
         tcg_abort(); \
     } while (0)
 
-/* Single bit n. */
-#define BIT(n) (1 << (n))
-
 /* Bitfield n...m (in 32 bit value). */
 #define BITS(n, m) (((0xffffffffU << (31 - n)) >> (31 - n + m)) << m)