Change in coreboot[master]: driver/wifi: Add _DSM method for DDRRFIM

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Varshit B Pandya, Subrata Banik, Maulik V Vaghela, Paul Menzel, Sugnan Prabhu S, Tim Wawrzynczak.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/61020 )

Change subject: driver/wifi: Add _DSM method for DDRRFIM
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Patch Set 23: Code-Review+1

(2 comments)

File src/drivers/wifi/generic/acpi.c:

https://review.coreboot.org/c/coreboot/+/61020/comment/ed4d1a60_53d16bba 
PS23, Line 157: bool *is_cnvi_ddr_rfim_enabled = NULL;
              : 	is_cnvi_ddr_rfim_enabled = (bool *)ptr;
              : 	acpigen_write_return_integer(*is_cnvi_ddr_rfim_enabled);
nit: I would simplify this to:
```
const bool is_cnvi_ddr_rfim_enabled = *(bool *)ptr;
acpigen_write_return_integer(is_cnvi_ddr_rfim_enabled ? 1 : 0);
```

https://review.coreboot.org/c/coreboot/+/61020/comment/3bfedbc0_7d86eec6 
PS23, Line 540: if (dev)
`if (dev && config)`