error handling: Use RETRY_ON_EINTR() macro where applicable

There is a defined RETRY_ON_EINTR() macro in qemu/osdep.h
which handles the same while loop.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/415
Signed-off-by: Nikita Ivanov <nivanov@cloudlinux.com>
Message-Id: <20221023090422.242617-3-nivanov@cloudlinux.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
[thuth: Dropped the hunk that changed socket_accept() in libqtest.c]
Signed-off-by: Thomas Huth <thuth@redhat.com>

semihosting/syscalls.c

@@ -317,9 +317,7 @@ static void host_read(CPUState *cs, gdb_syscall_complete_cb complete,
         complete(cs, -1, EFAULT);
         return;
     }
-    do {
-        ret = read(gf->hostfd, ptr, len);
-    } while (ret == -1 && errno == EINTR);
+    ret = RETRY_ON_EINTR(read(gf->hostfd, ptr, len));
     if (ret == -1) {
         complete(cs, -1, errno);
         unlock_user(ptr, buf, 0);