drivers/wifi/generic/acpi.c: NULL-check pointers before dereferencing

Checking whether a pointer is NULL after it has been dereferenced makes
zero sense. Make sure the `wifi_ssdt_write_properties()` function never
gets invoked with a NULL argument for the `dev` parameter, and simplify
the logic around the `is_cnvi_ddr_rfim_enabled` variable accordingly.

Change-Id: I3fbc9565e7e9b4e1c14a68f6a5fd779577045236
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63340
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

0 files changed, 0 insertions, 0 deletions