wil6210: wil_platform: Demote kernel-doc header to standard comment block

There has been no attempt to document any of the function parameters here.

Fixes the following W=1 kernel build warning(s):

 drivers/net/wireless/ath/wil6210/wil_platform.c:27: warning: Function parameter or member 'dev' not described in 'wil_platform_init'
 drivers/net/wireless/ath/wil6210/wil_platform.c:27: warning: Function parameter or member 'ops' not described in 'wil_platform_init'
 drivers/net/wireless/ath/wil6210/wil_platform.c:27: warning: Function parameter or member 'rops' not described in 'wil_platform_init'
 drivers/net/wireless/ath/wil6210/wil_platform.c:27: warning: Function parameter or member 'wil_handle' not described in 'wil_platform_init'

Cc: Maya Erez <merez@codeaurora.org>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: wil6210@qti.qualcomm.com
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200827073832.GW3248864@dell