Generate package and header file for HDL

[Taichi Ishitani]

Generate package and header file for HDL. This file contains parameters showing offset address, bit offset, etc, like C header file.

[Taichi Ishitani]

Calculating expanded offset address and byte size are common logic between c header file generation and RTL package generation.
Therefore, these logics should be moved to rggen-default-register-map plugin.

• register/offset_address#expanded_offset_addresses
  • change its implementation
  • should return expanded addresses for all register entries even if register type is indirect.
• register/size#byte_size
  • add hierarchical argument
  • if set true then return byte size calucurated with array size of upper layers
• register/size#array_size
  • add hierarchical argument
  • if set true then return array size including array size of upper layers
• register/size#array?
  • add hierarchical argument
  • if set true return true if there is one array register file at least