treewide: Remove unused FSL QSPI config options for Layerscape platforms

treewide: Remove unused FSL QSPI config options for Layerscape platforms

Some of these options are not used by the driver anymore and some of
them are obsolete as the information is gathered from the dt. Also
consolidating defines in common headers.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>