wifi: rtw89: fix physts IE page check

wifi: rtw89: fix physts IE page check

[ Upstream commit 9e2f177de1bfb7d891bf38140bda54831ecef30d ]

The index RTW89_PHYSTS_BITMAP_NUM is not a valid physts IE page.
So, fix the check condition.

Fixes: eb4e52b3f38d ("rtw89: fix incorrect channel info during scan")
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221118042322.26794-1-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@kernel.org>