test: verify writing memory using 'rw' passes
test: verify writing memory using 'rw' passes

Write to memory using 'rw' console command with:
- '.b' format for single byte write
- '.h' format for half word write
- No format specifier for 4 byte write

BRANCH=none
BUG=b:242910148
TEST=twister -s zephyr/test/drivers/drivers.default

Signed-off-by: Yuval Peress <50dc11c009bd4d7e9d9d15a383c1743ce5ee82ef@google.com>
Change-Id: Ie66b8b63d72311972ece9d2dbb732bdc6e2a2b7a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3849369
Reviewed-by: Aaron Massey <79529a820df71f45023239a3663736629646cc34@google.com>
Code-Coverage: Zoss <345cf107e82c70959d46f59d98bddc98ce458aff@prod.google.com>
Reviewed-by: Tristan Honscheid <1e17951ff5ffc8afe254954c03de64afef62fe52@google.com>

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