staging: r8188eu: DYNAMIC_BB_ANT_DIV is not used

Remove the DYNAMIC_BB_ANT_DIV capability. It's cleared in one place but
never checked.

DYNAMIC_BB_ANT_DIV is part of podmpriv->SupportAbility, there are no
users that check SupportAbility as a whole and use DYNAMIC_BB_ANT_DIV
implicitly.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220321203031.143486-5-martin@kaiser.cx


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