Modified the naming scheme for hardware tables.

Modified the naming scheme for hardware tables.

Because of historical string munging during the kernel build process
if you named your hardware table hwtable-something, when it was built
the filename would look appropriate, but the actual module info would change
the internal name to be hwtable_something, thus after an insmod with the filename
you could not perform an rmmod with the same filename. As a result
the naming scheme has been changed to hwtable_NAME, NAME being the hardware
the table supports.

Further, include files in the hardware table should be prefixed with the
folder name, e.g. #include "hwtable_NAME/my_header.h".

Based on commits from David Erickson <derickso@stanford.edu>.