Add new PCI and USB drivers to flashrom.mk to disable them in other
build variant.s
Fix DefineConfig calls to use new config symbols, and have it only
append NEED_FEATURE=yes to MAKE_FLAGS. Appending NEED_FEATURE=no would
still enable the feature because upstream compares against an empty
string instead of comparing to yes.
Drop libusb-compat dependency as all drivers use libusb-1 now.
Remove upstreamed patch 010-add-arc.patch.
Rework 0001-fix_internal_bitbang.patch, give it a correct prefix and
more descriptive name.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>