tcg: Make some tcg-target.c routines static.

Both tcg_target_init and tcg_target_qemu_prologue
are unused outside of tcg.c.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index 9f970cd..5f1353a 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -691,7 +691,7 @@
 #endif
 
 /* Generate global QEMU prologue and epilogue code */
-void tcg_target_qemu_prologue(TCGContext *s)
+static void tcg_target_qemu_prologue(TCGContext *s)
 {
     tcg_out32(s, SAVE | INSN_RD(TCG_REG_O6) | INSN_RS1(TCG_REG_O6) |
               INSN_IMM13(-TCG_TARGET_STACK_MINFRAME));
@@ -1533,7 +1533,7 @@
     { -1 },
 };
 
-void tcg_target_init(TCGContext *s)
+static void tcg_target_init(TCGContext *s)
 {
     tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
 #if TCG_TARGET_REG_BITS == 64