bcm53xx: backport spi-nor changes and update bcm53xxspiflash

...linux/bcm53xx/files/drivers/mtd/spi-nor/bcm53xxspiflash.c

...inux/bcm53xx/patches-3.14/002-mtd-spi-nor-from-3.18.patch

...inux/bcm53xx/patches-3.14/003-mtd-spi-nor-from-3.19.patch

...td-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch

...td-bcm53xxspiflash-new-driver-for-SPI-flahes-on-Bro.patch

...td-bcm53xxspiflash-try-using-JEDEC-as-one-of-method.patch

...inux/bcm53xx/patches-3.18/003-mtd-spi-nor-from-3.19.patch

...td-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch

...td-bcm53xxspiflash-new-driver-for-SPI-flahes-on-Bro.patch

...td-bcm53xxspiflash-try-using-JEDEC-as-one-of-method.patch