MAINTAINERS: add Jeff as ath10k, ath11k and ath12k maintainer

Jeff will now start maintaining these drivers together with me.
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230725094248.3205486-1-kvalo@kernel.org

MAINTAINERS

@@ -17430,6 +17430,7 @@ F:	drivers/media/tuners/qt1010*
 
 QUALCOMM ATH12K WIRELESS DRIVER
 M:	Kalle Valo <kvalo@kernel.org>
+M:	Jeff Johnson <quic_jjohnson@quicinc.com>
 L:	ath12k@lists.infradead.org
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
@@ -17437,6 +17438,7 @@ F:	drivers/net/wireless/ath/ath12k/
 
 QUALCOMM ATHEROS ATH10K WIRELESS DRIVER
 M:	Kalle Valo <kvalo@kernel.org>
+M:	Jeff Johnson <quic_jjohnson@quicinc.com>
 L:	ath10k@lists.infradead.org
 S:	Supported
 W:	https://wireless.wiki.kernel.org/en/users/Drivers/ath10k
@@ -17446,6 +17448,7 @@ F:	drivers/net/wireless/ath/ath10k/
 
 QUALCOMM ATHEROS ATH11K WIRELESS DRIVER
 M:	Kalle Valo <kvalo@kernel.org>
+M:	Jeff Johnson <quic_jjohnson@quicinc.com>
 L:	ath11k@lists.infradead.org
 S:	Supported
 W:	https://wireless.wiki.kernel.org/en/users/Drivers/ath11k