ite: Fix SRAM size for ITE81302-512
ite: Fix SRAM size for ITE81302-512

The ITE81302-512 has 60Kb of SRAM.

BUG=b:204231736
TEST=make -j buildall
BRANCH=none

Change-Id: I64f3a41c6df1738cdbb409c8098f485e8e224bb7
Signed-off-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3276027
Reviewed-by: Dino Li <338d523ecf3700bd86eb9c34d220f91911d2a18c@ite.com.tw>
Reviewed-by: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec