DVLA will know nothing about you being due to attend court for drink driving so they have no reason to ask you to surrender your licence.
That is correct for the drink driving allegation (you might be found not guilty so they would not be able to ask for your licence, if you thing about it.
BUT
They could have been notified of concerns about your drinking and decide to make enquiries to revoke your licence. This does not have to involve a drink drive charge. Have you had a letter from DVLA and if so, what grounds do they give for asking for your licence to be sent back?
I am not clear about what is coming from DVLA, ‘asking for your licence’ doesn’t happen, but revoking it does happen. Can you clarify?