mtd: spi-nor: winbond: Add support for W25H512NWxxAM chips

mtd: spi-nor: winbond: Add support for W25H512NWxxAM chips

commit f21d2c7d37553b24825918f2f61df123e182b712 upstream.

These chips must be described as none of the block protection
information are discoverable. This chip supports 4 bits plus the
top/bottom addressing capability to identify the protected blocks.

Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Signed-off-by: Pratyush Yadav <pratyush@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>