refactor(nxp-mmc): check multi block transfer

Extract the multiblock check into a dedicated function. This function
returns true for multiblock reads and writes.

Change-Id: I6c4ea62977781a4f43d6a20513147b99b3baa1b2
Co-developed-by: Ciprian Costea <ciprianmarian.costea@nxp.com>
Signed-off-by: Ciprian Costea <ciprianmarian.costea@nxp.com>
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
1 file changed