Disable Duplicate scan, no longer available

[Iotfabula]

Unable to disable duplicate scan filter, before latest commit ( Whitelist feature ), filter
could be disabled by declaring scan with BT_HCI_LE_SCAN_FILTER_DUP_DISABLE parameter, now
semantic changed, and this option no longer available

File affected:
include/bluetooth/bluetooth.h

Expected behavior
User should be enable disable duplicate filter, those enable to see every single BLE advertisements

Impact
New Whitelist feature, somehow make this filter always on, preventing our board to see
all adv packets

Add any other context about the problem here.

[aescolar]

CC @jhedberg

[joerchan]

The option is still there. If no filtering on scan is needed assign filter_dup to 0

struct bt_le_scan_params *scan_param =
			  BT_LE_SCAN_PARAM(BT_HCI_LE_SCAN_ACTIVE, \
					   0, \
					   BT_GAP_SCAN_FAST_INTERVAL, \
					   BT_GAP_SCAN_FAST_WINDOW

BTMON:

< HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2                               #45 [hci0] 9.180057
        Scanning: Enabled (0x01)
        Filter duplicates: Disabled (0x00)

[joerchan]

Since BT_HCI_LE_SCAN_FILTER_DUP_DISABLE = 0x00 this option can still be used as well.