UBUNTU: SAUCE: rtw88: 8723d: set ltecoex register address in chip_info

UBUNTU: SAUCE: rtw88: 8723d: set ltecoex register address in chip_info

BugLink: https://bugs.launchpad.net/bugs/1780590
Since 8723D use different address of ltecoex register, this commit add a
new field in chip_info and fill proper address. Then, ltecoex_read_reg()
and ltecoex_reg_write() can use them to access ltecoex according to chip.

Change-Id: Ie23457dd30d9ad27b1a79f0964ffe775d4c48b05
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>