wifi: rtw89: change naming of BA CAM from V1 to V0_EXT

BA CAM of 8852C has more entries and more fields of H2C, and needs
initialization before using. Due to differences from 8852A/8852B, we name
it as V1 before. However, real V1 of BA CAM is introduced now, so change
it to V0_EXT to avoid confusing with firmware design.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230421024551.29994-7-pkshih@realtek.com