rtw88: fix LDPC field for RA info

Convert the type of LDPC field to boolen because
LDPC field of RA info H2C command to firmware
is only one bit.

Fixes: e3037485

 ("rtw88: new Realtek 802.11ac driver")
Signed-off-by: Tsang-Shian Lin <thlin@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200717064937.27966-2-yhchuang@realtek.com