wifi: iwlwifi: fix pointer arithmetic in iwl_add_mcc_to_tas_block_list

wifi: iwlwifi: fix pointer arithmetic in iwl_add_mcc_to_tas_block_list

The expression list[*size++] increments the pointer 'size'
rather than the u8 value it points to (operator precedence: ++
binds to the pointer before the dereference). As a result the
block-list entry is written at the correct index but *size is
never incremented, so the caller's count stays at zero and
subsequent calls overwrite slot 0 every time.

Change to list[(*size)++] so that the value pointed to by size
is incremented after use as the array index.

Fixes: 5f4656610edb ("wifi: iwlwifi: extend TAS_CONFIG cmd support for v5")
Assisted-by: GitHubCopilot:gpt-5.3-codex
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260715215523.d2cd92242582.Ife4140a4e27be2a1cd9f886c5a9b376ce182a019@changeid