tci: fix build breakage for target MIPS

commit 5f7319cd introduced GETPC() usage for MIPS, which is currently
not defined when building with --enable-tcg-interpreter. Add MIPS to
the list of targets we selectively define GETPC() for.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

exec-all.h

@@ -290,10 +290,11 @@ extern int tb_invalidated_flag;
 /* The return address may point to the start of the next instruction.
    Subtracting one gets us the call instruction itself.  */
 #if defined(CONFIG_TCG_INTERPRETER)
-/* Alpha and SH4 user mode emulations and Softmmu call GETPC().
+/* Softmmu, Alpha, MIPS, SH4 and SPARC user mode emulations call GETPC().
    For all others, GETPC remains undefined (which makes TCI a little faster. */
-# if defined(CONFIG_SOFTMMU) || defined(TARGET_ALPHA) || defined(TARGET_SH4) \
-     || defined(TARGET_SPARC)
+# if defined(CONFIG_SOFTMMU) || \
+    defined(TARGET_ALPHA) || defined(TARGET_MIPS) || \
+    defined(TARGET_SH4) || defined(TARGET_SPARC)
 extern uintptr_t tci_tb_ptr;
 #  define GETPC() tci_tb_ptr
 # endif