Tidy up RC4 a little.

RC4_CHUNK is always defined, RC4_INT is always uint32_t and the
"register" keyword is an anachronism.

Change-Id: Ia752af30ba6bac0ee6216ce189fcf3888de73c6e
Reviewed-on: https://boringssl-review.googlesource.com/3544
Reviewed-by: Adam Langley <agl@google.com>
1 file changed