configure.ac: Cosmetics for the list of drivers.

configure.ac: Cosmetics for the list of drivers.

Use the canonical driver name (all-lowercase, e.g. "serial-dmm") in the
list of enabled/disabled drivers that configure prints after a run.

It's common to many drivers that they support multiple devices, so
printing one device name (e.g. "ChronoVu LA8") is seldom really correct.
E.g. the agilent-dmm, asix-sigma, brymen-dmm, colead-slm, fluke-dmm,
fx2lafw, hantek-dso, lascar-el-usb, mic-985xx, openbench-logic-sniffer,
rigol-ds1xx2, uni-t-dmm, victor-dmm, and zeroplus-logic-cube drivers
all support more than just one device.

So, just print the driver name instead which is more correct anyway
since it's specifically a list of enabled/disabled drivers.