soc/intel/common/block/lpc: Make integer literal unsigned long

```
    CC         romstage/soc/intel/common/block/*/lpc_lib.o
src/soc/intel/common/block/lpc/lpc_lib.c:91:17: warning: The result of the '<<' expression is undefined
                alignment = 1 << (log2_ceil(window_size));
                            ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
```

Change-Id: I9bf2283e23ca7739a7e5b0993d9b6034ea28fb78
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/22201
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

0 files changed, 0 insertions, 0 deletions