tcg/mips: Fix type of tcg_target_reg_alloc_order[]

The MIPS TCG backend is the only one to have
tcg_target_reg_alloc_order[] elements of type TCGReg rather than int.
This resulted in commit 91478cef ("tcg: Allocate indirect_base
temporaries in a different order") breaking the build on MIPS since the
type differed from indirect_reg_alloc_order[]:

tcg/tcg.c:1725:44: error: pointer type mismatch in conditional expression [-Werror]
     order = rev ? indirect_reg_alloc_order : tcg_target_reg_alloc_order;
                                            ^

Make it an array of ints to fix the build and match other architectures.

Fixes: 91478cef ("tcg: Allocate indirect_base temporaries in a different order")
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Acked-by: NAurelien Jarno <aurelien@aurel32.net>
Message-Id: <1459522179-6584-1-git-send-email-james.hogan@imgtec.com>
Signed-off-by: NRichard Henderson <rth@twiddle.net>

tcg/mips/tcg-target.inc.c

@@ -76,7 +76,7 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
 #define TCG_TMP1  TCG_REG_T9
 
 /* check if we really need so many registers :P */
-static const TCGReg tcg_target_reg_alloc_order[] = {
+static const int tcg_target_reg_alloc_order[] = {
     /* Call saved registers.  */
     TCG_REG_S0,
     TCG_REG_S1,