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SpiFlash driver configuration
-----------------------------
Folowing PCDs for spi flash driver configuration must be set properly:

 gMarvellTokenSpaceGuid.PcdSpiFlashAddressCycles

Size of SPI flash address in bytes (3 or 4)

 gMarvellTokenSpaceGuid.PcdSpiFlashEraseSize

Size of minimal erase block in bytes

 gMarvellTokenSpaceGuid.PcdSpiFlashPageSize

Size of SPI flash page

 gMarvellTokenSpaceGuid.PcdSpiFlashId

Id of SPI flash

 gMarvellTokenSpaceGuid.PcdSpiFlashPollCmd

Spi flash polling flag