mtd: nand: lpc32xx_slc: improve SLCTAC_*() macro definitions
mtd: nand: lpc32xx_slc: improve SLCTAC_*() macro definitions

No functional change, move bitfield calculations to macro
definitions with added clock rate argument, which are in turn defined
by new common SLCTAC_CLOCKS(c, n, s) macro definition.

Signed-off-by: Vladimir Zapolskiy <cab8e3b5e86fec6508364ac368c160d09cd3a3dc@mleia.com>
Signed-off-by: Brian Norris <ac73eed4b8a8c9127255a2696c52b2e7503720b8@gmail.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs