Add support for Macronix MX25R6435F Flash

[daniel-0723]

Macronix MX25R series nor Flash has 3 power modes: HighPerformance Mode, LowPower Mode
and DeepPowerDown Mode. However, if you want to control MX25R flash in Renesas FSP
platform, you can not easily change the power mode. The MX25R Extend module based on QSPI
module can provide some specific functions as follows:
RDID()
RDSR()
RDSCUR()
RDCR()
MX25R_HighPerformanceMode()
MX25R_LowPowerMode()
MX25R_Enter_DeepPower()
MX25R_Exit_DeepPower()
MX25R_Device_Reset()

[CLAassistant]

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