test: run 'md' command with various format options
test: run 'md' command with various format options

Check that the 'md' console command runs successfully with the
following format options:
- .b for single byte
- .h for half word
- .s for string (including non printable characters)

BRANCH=none
BUG=b:242910040
TEST=twister -s zephyr/test/drivers/drivers.default

Change-Id: I1239aa7c73b358218bdd9318a45d30bc20f1057b
Signed-off-by: Yuval Peress <50dc11c009bd4d7e9d9d15a383c1743ce5ee82ef@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3847011
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