Trivial cleanups around semihosting code.

Guan: Do you have binaries to run testing?

I couldn't rebuild anything from https://github.com/gxt/UniCore32
that you referenced here:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg608054.html
- u-boot patches are missing
- which gnu-toolchain-unicore should we use?
- your webpage is down: http://mprc.pku.edu.cn/~guanxuetao/
- there are too many warnings reported for QEMU 2.7-stable.

Philippe Mathieu-Daudé (3):
  target/unicore32: Remove unused headers
  target/unicore32: Replace DPRINTF() by qemu_log_mask(GUEST_ERROR)
  target/unicore32: Prefer qemu_semihosting_log_out() over curses

 default-configs/unicore32-softmmu.mak |  1 +
 target/unicore32/helper.c             | 70 +++++----------------------
 2 files changed, 13 insertions(+), 58 deletions(-)

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2.21.3