tcg: Search includes from the project root source directory

We currently search both the root and the tcg/ directories for tcg
files:

  $ git grep '#include "tcg/' | wc -l
  28

  $ git grep '#include "tcg[^/]' | wc -l
  94

To simplify the preprocessor search path, unify by expliciting the
tcg/ directory.

Patch created mechanically by running:

  $ for x in \
      tcg.h tcg-mo.h tcg-op.h tcg-opc.h \
      tcg-op-gvec.h tcg-gvec-desc.h; do \
    sed -i "s,#include \"$x\",#include \"tcg/$x\"," \
      $(git grep -l "#include \"$x\""); \
    done

Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts)
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200101112303.20724-2-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/tcg/tcg-op-vec.c b/tcg/tcg-op-vec.c
index 6714991..b6937e8 100644
--- a/tcg/tcg-op-vec.c
+++ b/tcg/tcg-op-vec.c
@@ -19,9 +19,9 @@
 
 #include "qemu/osdep.h"
 #include "cpu.h"
-#include "tcg.h"
-#include "tcg-op.h"
-#include "tcg-mo.h"
+#include "tcg/tcg.h"
+#include "tcg/tcg-op.h"
+#include "tcg/tcg-mo.h"
 
 /* Reduce the number of ifdefs below.  This assumes that all uses of
    TCGV_HIGH and TCGV_LOW are properly protected by a conditional that