wifi: ath12k: dp_mon: Fix out of bounds clang warning

Fix below out-of-bounds access warning while processing ppdu end user
stats. The size of info array is 6 but storing 7 values, Fix this with
increasing info array size to 7.

Warning:
drivers/net/wireless/ath/ath12k/dp_mon.c:623:3: warning: array index 6 is past the end of the array (that has type 'u32[6]' (aka 'unsigned int[6]')) [-Warray-bounds]

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0-03171-QCAHKSWPL_SILICONZ-1
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thiraviyam Mariyappan <quic_tmariyap@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20221221105529.19345-4-quic_tmariyap@quicinc.com