x86: crownbay: Disable CONFIG_SPI_FLASH_SMART_HWCAPS

Since commit 71025f01 ("mtd: spi-nor-core: Rework hwcaps selection")
SPI flash on Intel Crown Bay board does not work anymore.

Disable CONFIG_SPI_FLASH_SMART_HWCAPS until a proper fix is made to
the spi-nor core.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>