nor: don't use sector for ERASE_START ...

Similar to ac2d4d7, copy the behaviour
from Linux which does:

cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);

Notice the third parameter which is simply chip->start. Needed for some
SST-flashes.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor: Don't use the sector for the unlock sequence ...

Copy the behaviour from Linux which does:

cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
...

(Notice the third parameter which is simply chip->start).

Solves erase problems with SST flashes.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cfi_flash: move include/cfi_flash.c next to driver ...

This file has no useful things for others than the driver,
so move it next to the driver and remove the corresponding
include from other files.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cfi_flash: remove old driver and switch to new one ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cfi_flash_new: generate flash erase dots in common function ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cfi new: fix new disabling buffer support ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Move cfi flash drivers to drivers/nor as suggested by Nishanth Menon ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>