tests: kernel: smp: Test cpu affinity with custom ROM offset

What is the changed?
CPU affinity test for SMP cores will now cover a change in ROM offset.

How is it changed?
Add a new testcase section with ROM offset set to something other than
the default 0.

Why is it change?
There is no test to cover the issue reported in #76182 and the cpu
affinity test is the closest to test the issue. Adding a new testcase
will makes sure there is no breaking change in the future.

Signed-off-by: Sudan Landge <[email protected]>

Author: wearyzen

tests/kernel/smp/testcase.yaml

@@ -24,3 +24,13 @@ tests:
     filter: (CONFIG_MP_MAX_NUM_CPUS > 1)
     extra_configs:
       - CONFIG_SCHED_CPU_MASK=y
+
+  kernel.multiprocessing.smp.affinity.custom_rom_offset:
+    tags:
+      - kernel
+      - smp
+    ignore_faults: true
+    filter: (CONFIG_MP_MAX_NUM_CPUS > 1)
+    extra_configs:
+      - CONFIG_SCHED_CPU_MASK=y
+      - CONFIG_ROM_START_OFFSET=0x80