wifi: ath5k: debug.h: fix enum ath5k_debug_level kernel-doc

wifi: ath5k: debug.h: fix enum ath5k_debug_level kernel-doc

Add a description for ATH5K_DEBUG_ANI and delete the descriptions for
3 undefined enum descriptions to prevent these warnings:

Warning: drivers/net/wireless/ath/ath5k/debug.h:111 Enum value
 'ATH5K_DEBUG_ANI' not described in enum 'ath5k_debug_level'
Warning: drivers/net/wireless/ath/ath5k/debug.h:111 Excess enum value
 '%ATH5K_DEBUG_DUMP_RX' description in 'ath5k_debug_level'
Warning: drivers/net/wireless/ath/ath5k/debug.h:111 Excess enum value
 '%ATH5K_DEBUG_DUMP_TX' description in 'ath5k_debug_level'
Warning: drivers/net/wireless/ath/ath5k/debug.h:111 Excess enum value
 '%ATH5K_DEBUG_TRACE' description in 'ath5k_debug_level'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251128010401.546506-1-rdunlap@infradead.org
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>