linux-wandboard

MLK-17121: mtd: fsl-flexspi: re-init the flexspi after suspend/resume

re-init the flexspi controller after suspend/resume.

runtime resume will re-init the controller, Once the it was initialized
and need to be re-init(determined by read specific register bit).

Signed-off-by: Han Xu <han.xu@nxp.com>