[nrf fromtree] net: wifi_shell: Add help for maximum channels in scan

Add a line for scan's -c parameter which specify
to take care of maximum channels.

Signed-off-by: Kapil Bhatt <[email protected]>
(cherry picked from commit c22ce80)

subsys/net/l2/wifi/wifi_shell.c

@@ -1905,7 +1905,7 @@ SHELL_STATIC_SUBCMD_SET_CREATE(wifi_commands,
 		    "[-p, --dwell_time_passive <val_in_ms>] : Passive scan dwell time (in ms) on a channel. Range 10 ms to 1000 ms\n"
 		    "[-s, --ssid] : SSID to scan for. Can be provided multiple times\n"
 		    "[-m, --max_bss <val>] : Maximum BSSes to scan for. Range 1 - 65535\n"
-		    "[-c, --chans <Comma separated list of channel ranges>] : Channels to be scanned. The channels must be specified in the form band1:chan1,chan2_band2:chan3,..etc. band1, band2 must be valid band values and chan1, chan2, chan3 must be specified as a list of comma separated values where each value is either a single channel or a channel range specified as chan_start-chan_end. Each band channel set has to be separated by a _. For example, a valid channel specification can be 2:1,6_5:36 or 2:1,6-11,14_5:36,163-177,52\n"
+		    "[-c, --chans <Comma separated list of channel ranges>] : Channels to be scanned. The channels must be specified in the form band1:chan1,chan2_band2:chan3,..etc. band1, band2 must be valid band values and chan1, chan2, chan3 must be specified as a list of comma separated values where each value is either a single channel or a channel range specified as chan_start-chan_end. Each band channel set has to be separated by a _. For example, a valid channel specification can be 2:1,6_5:36 or 2:1,6-11,14_5:36,163-177,52. Care should be taken to ensure that configured channels don't exceed CONFIG_WIFI_MGMT_SCAN_CHAN_MAX_MANUAL\n"
 		    "[-h, --help] : Print out the help for the scan command.\n",
 		  cmd_wifi_scan,
 		  1, 8),