[PATCH 1/1 v3] driver:mtd:spi-nor: Add Micron quad I/O support

[Bean Huo 霍斌斌 (beanhuo)]

>This patch adds code which enables Quad I/O mode on Micron SPI NOR flashes.

>For Micron SPI NOR flash, enabling or disabling quad I/O protocol is controlled by 
>EVCR (Enhanced Volatile Configuration Register), Quad I/O protocol bit 7. 
>When EVCR bit 7 is reset to 0, the SPI NOR flash will operate in quad I/O mode.

>Signed-off-by: bean huo <beanhuo at micron.com>
>Acked-by: Marek Vasut <marex at denx.de>

Hi,Brian
Is this patch OK?