ARM: dts: lpc18xx: add #address-cell and #szie-cell for spi flash controller

ARM: dts: lpc18xx: add #address-cell and #szie-cell for spi flash controller

Add #address-cells and #szie-cells for spi flash controller to fix below
CHECK_DTB warning:
arch/arm/boot/dts/nxp/lpc/lpc18xx.dtsi:103.23-112.5: Warning (spi_bus_bridge): /soc/spi@40003000: incorrect #address-cells for SPI bus
  also defined at arch/arm/boot/dts/nxp/lpc/lpc4350-hitex-eval.dts:452.8-479.3
arch/arm/boot/dts/nxp/lpc/lpc18xx.dtsi:103.23-112.5: Warning (spi_bus_bridge): /soc/spi@40003000: incorrect #size-cells for SPI bus
  also defined at arch/arm/boot/dts/nxp/lpc/lpc4350-hitex-eval.dts:452.8-479.3

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>