tci: Fix type of tci_read_label

Fixes the pointer truncation that was occurring for branches.

Cc: Stefan Weil <sw@weilnetz.de>
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Tested-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
(cherry picked from commit c6c5063c7a5bb1d3fe6b9931a1ec15294e39b8b1)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

tci.c

@@ -338,9 +338,9 @@ static uint64_t tci_read_ri64(uint8_t **tb_ptr)
 }
 #endif
 
-static target_ulong tci_read_label(uint8_t **tb_ptr)
+static tcg_target_ulong tci_read_label(uint8_t **tb_ptr)
 {
-    target_ulong label = tci_read_i(tb_ptr);
+    tcg_target_ulong label = tci_read_i(tb_ptr);
     assert(label != 0);
     return label;
 }