MSPI driver does not assign the 'op_mode' and 'duplex' in mspi_cfg

[FRASTM]

Describe the bug
in the description of the devicetree for the Multi-bit SPI Bus
property op-mode and duplex are supposed to be set as follows

 			op-mode = "MSPI_CONTROLLER";
			duplex = "MSPI_HALF_DUPLEX";

The MSPI_CONFIG macro is capturing the mspi_cfg with (see drivers/mspi/mspi_emul.c)

		.op_mode = DT_ENUM_IDX_OR(n, op_mode, MSPI_OP_MODE_CONTROLLER),
		.duplex = DT_ENUM_IDX_OR(n, duplex, MSPI_HALF_DUPLEX),

which does not accept
op-mode = "MSPI_CONTROLLER";
duplex = "MSPI_HALF_DUPLEX";

To Reproduce
Steps to reproduce the behavior:

1. add overlay file for the mspi1 node with properties 'op-mode' and 'duplex' as above
2. west build
3. See error

Expected behavior
Use the appropriate DT macro to retrieve the mspi_config

mspi_config = 	
	{
		.channel_num = EMUL_MSPI_INST_ID, 		
		.op_mode = MSPI_OP_MODE_CONTROLLER,
		.duplex = MSPI_HALF_DUPLEX,
		etc.
	}

Logs and console output

devicetree_generated.h:8377:46: error: incompatible types when initializing type 'enum mspi_op_mode' using type 'char *'
...
in expansion of macro 'MSPI_BUS_NODE'
   37 |         .op_mode                  = DT_PROP_OR(MSPI_BUS_NODE, op_mode, MSPI_OP_MODE_CONTROLLER),


devicetree_generated.h:8393:45: error: incompatible types when initializing type 'enum mspi_duplex' using type 'char *'
...
 in expansion of macro 'MSPI_BUS_NODE'
   38 |         .duplex                   = DT_PROP_OR(MSPI_BUS_NODE, duplex, MSPI_HALF_DUPLEX),

Environment (please complete the following information):

• OS: (e.g. Linux, MacOS, Windows) ubuntu
• Toolchain (e.g Zephyr SDK, ...) 0.16.8
• Commit SHA or Version used 03959a2

-->

[swift-tk]

In the error, it uses DT_PROP_OR not DT_ENUM_IDX_OR.
Although it should have been DT_INST_ENUM_IDX_OR... caught a slient fail in mspi_emul.c

oh, i see the code is in tests/drivers/mspi/api/src/main.c