staging: rtl8192u: make read-only array EWC11NHTCap static const

Don't populate the read-only array EWC11NHTCap on the stack but instead
make it static const. Also makes the object code a little smaller.
Remove comment.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220414103650.297396-1-colin.i.king@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>