drivers: display: ili9xxx: read mipi-mode, only use SPI mode as fallback

Instead of always using the SPI MIPI DBI mode (type C), look up the
mipi-mode from the device tree and only set the mode to
MIPI_DBI_MODE_SPI_4WIRE as a fallback in case the property is not given.

Signed-off-by: Stefan Gloor <[email protected]>

Author: stgloorious

drivers/display/display_ili9xxx.c

@@ -520,7 +520,8 @@ static const struct ili9xxx_quirks ili9488_quirks = {
 		.quirks = &ili##t##_quirks,                                    \
 		.mipi_dev = DEVICE_DT_GET(DT_PARENT(INST_DT_ILI9XXX(n, t))),   \
 		.dbi_config = {                                                \
-			.mode = MIPI_DBI_MODE_SPI_4WIRE,                       \
+			.mode = DT_PROP_OR(INST_DT_ILI9XXX(n, t),              \
+				mipi_mode, MIPI_DBI_MODE_SPI_4WIRE),           \
 			.config = MIPI_DBI_SPI_CONFIG_DT(                      \
 						INST_DT_ILI9XXX(n, t),         \
 						SPI_OP_MODE_MASTER |           \