* Declare global arch arrays with contents (#1171)
This eliminates the need for archs_enable() and eliminates the racey
initialization.
This makes the architecture-specific init and option functions
non-static so that they may be called from a different file.
Cherry-picked 853a2870
* Add cs_arch_disallowed_mode_mask global
Cherry-pick 94bce437:
mips: CS_MODE_MIPS32R6 implies CS_MODE_32
Cherry-pick 8998a3a1:
ppc: fix endian check (#1029)
Fixes bug where endianness could not be set for ppc.
Remove `big_endian` field of `cs_struct`.
Added a helper macro `MODE_IS_BIG_ENDIAN()` to check if
`CS_MODE_BIG_ENDIAN` is set.
Refactored `cs_open()` check for valid mode out of arch-specific code
into arch-independent code. Also added a valid mode check to
`cs_option()`. The checks use a new global array
`cs_arch_disallowed_mode_mask[]`.
* Make global arrays static
Make all_arch uint32_t to guarantee a certain number of bits (with
adequate room for growth).
