target-xtensa: fix translation for opcodes crossing page boundary

target-xtensa: fix translation for opcodes crossing page boundary

If TB ends with an opcode that crosses page boundary and the following
page is not executable then EPC1 for the code fetch exception wrongly
points at the beginning of the TB. Always treat instruction that crosses
page boundary as a separate TB.

Cc: qemu-stable@nongnu.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
(cherry picked from commit 01673a3401614b4199c9946ad47b97bedfc7a7c2)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>