mb/google/cyan/spd/spd.c: Fix module part number transfer

With the increase of dimm->module_part_number size from 19 to 21 (commit
35b273eea3) "include/memory_info.h: Change part number field from 19 bytes
to 21", this code is now advancing outside DDR3 SPD designated space. The
correct size is already defined as LPDDR3_SPD_PART_LEN, use it. Also make
sure to 0 terminate the string.

BUG=b:77943312
TEST=Build cyan.

Change-Id: Iba0ef4149acfc09b7672fce079df06bf1a01dff6
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/25702
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
1 file changed