Staging: rtl8192e: Rename variable SelfHTCap

Rename variable SelfHTCap to self_ht_cap to fix checkpatch
warning Avoid CamelCase.

Signed-off-by: Tree Davies <tdavies@darkphysics.net>
Link: https://lore.kernel.org/r/20240126223106.986093-11-tdavies@darkphysics.net


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