drop 4 mmc patches from queue-5.10 based on RC review feedback

drop 4 mmc patches from queue-5.10 based on RC review feedback

Dropped patches (dependency chain):

- "mmc: core: Drop redundant member in struct mmc_host" (951f6ccfcbb7)
- "mmc: core: Drop superfluous validations in mmc_hw|sw_reset()" (fefdd3c91e0a)
- "mmc: core: Drop reference counting of the bus_ops" (e9ce2ce17da6)
- "mmc: core: Avoid bitfield RMW for claim/retune flags" (901084c51a0a)

Reason: maintainer (Ulf Hansson) and reviewer (Ben Hutchings) identified
that companion fix 406e14808ee6 is needed but does not apply to 5.10,
so the entire dependency chain is dropped.

Report: https://lore.kernel.org/stable/CAPDyKFo1DWRbidKrMg+DkwOxsdzDrfF5+YVhjjzGZzkAC7=Yfg@mail.gmail.com/
Report: https://lore.kernel.org/stable/65cd5a0b7c68af467b8b13b4fbce51cc2febb5ad.camel@decadent.org.uk/