wifi: rtlwifi: cleanup struct rtl_phy

Remove unused and read by otherwise unused 'h2c_box_num',
'rfpienable', 'reserve_0', 'reserve_1', 'iqk_in_progress',
'apk_done' and 'hw_rof_enable' fields of 'struct rtl_phy',
adjust related code. Compile tested only.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20231023091722.52509-2-dmantipov@yandex.ru