mtd: bcm47xxnflash: add cmd_ctrl handler
mtd: bcm47xxnflash: add cmd_ctrl handler

This won't be used by NAND subsystem as we implement cmdfunc on our
own, but will allow us to write a bit cleaner code.

Signed-off-by: Rafał Miłecki <dced371c11179e2cb83b1e305b9d7b15f379452b@gmail.com>
Signed-off-by: Brian Norris <ac73eed4b8a8c9127255a2696c52b2e7503720b8@gmail.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs