uboot-imx

sf: Move spi_read_cmds_array locally

Since spi_read_cmds_array is used locally in
spi_flash_scan, so move array to locally used
function instead of defining global array.

Tested-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>