wifi: rtw89: fw: correct debug message format in rtw89_build_txpwr_trk_tbl_from_elm()

The format should be "%08x". Fix the mistakes.

Fixes: d60e73e5 ("wifi: rtw89: fw: load TX power track tables from fw_element")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250227131228.8457-4-pkshih@realtek.com