include: mipi_dbi: fix initialization statement for SPI operation field

SPI configuration "operation" field is a bitmask of several
configuration settings for the SPI interface when using SPI controllers
with the MIPI DBI API. The initialization statement for this
configuration structure had a comma after the "duplex" property where a
binary or should be present. correct this issue

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>