wifi: wil6210: fix repeated words in comments

Delete the redundant word 'for'.
Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220709132137.12442-1-yuanjilin@cdjrlc.com

drivers/net/wireless/ath/wil6210/txrx.h

@@ -356,7 +356,7 @@ struct vring_rx_mac {
  * bit     10 : cmd_dma_it:1 immediate interrupt
  * bit 11..15 : reserved:5
  * bit 16..29 : phy_info_length:14 It is valid when the PII is set.
- *		When the FFM bit is set bits 29-27 are used for for
+ *		When the FFM bit is set bits 29-27 are used for
  *		Flex Filter Match. Matching Index to one of the L2
  *		EtherType Flex Filter
  * bit 30..31 : l4_type:2 valid if the L4I bit is set in the status field