staging: r8188eu: DYNAMIC_RF_CALIBRATION is not used

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

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

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220321203031.143486-6-martin@kaiser.cx


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