mmc: mmci: Remove redundant check of status for DATA irq

mmc: mmci: Remove redundant check of status for DATA irq

We don't need to verify the content of the status register twice, while
we are about to handle a DATA irq. Instead let's leave all verification
to be handled by mmci_data_irq().

Cc: Peter Maydell <[email protected]>
Cc: John Stultz <[email protected]>
Cc: Russell King <[email protected]>
Tested-by: Kees Cook <[email protected]>
Tested-by: John Stultz <[email protected]>
Cc: <[email protected]> # v3.15+
Signed-off-by: Ulf Hansson <[email protected]>