volteer: Free up flash space
volteer: Free up flash space

Volteer is currently running out of flash space which prevents new
changes from landing in ToT. This CL will change remove PPC logging and
the history command from the EC to save space which saves about 1,450
bytes

Before
96 bytes in flash and 21600 bytes in RAM still available on volteer RO
204 bytes in flash and 21600 bytes in RAM still available on volteer RW

After
1568 bytes in flash and 22272 bytes in RAM still available on volteer RO
1736 bytes in flash and 22272 bytes in RAM still available on volteer RW

BRANCH=None
BUG=b:238327657
TEST=make try_build_boards

Signed-off-by: Jameson Thies <f7634680650d3a61d815c06afd564fea1c60a829@google.com>
Change-Id: I135ad8983eccf953e707182f63e60bdcbd47b7d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3751555
Reviewed-by: Abe Levkoy <2e1ad7039298f93262cf06bbb457275fb3e2ecb5@chromium.org>

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