qcacmn: Rename legacy definitions containing BPF to APF

In implementation of Android Packet Filter, functions, variables,
definitions are named after BPF, which stands for Berkely Packet
Filter. The term was more appropriate for Link Layer packet
filters implemented in the Linux kernel, known as Linux Socket
Filters.

The term BPF is obsolete now, so rename it with the
appropriate acronym, APF.

Change-Id: I606afc747cddedb524a41cd8e5998400f04e69f6
CRs-Fixed: 2191531

os_if/linux/qca_vendor.h

@@ -3825,13 +3825,13 @@ enum set_reset_packet_filter {
 };
 
 /**
- * enum qca_wlan_vendor_attr_packet_filter - BPF control commands
+ * enum qca_wlan_vendor_attr_packet_filter - APF control commands
  * @QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_INVALID: Invalid
  * @QCA_WLAN_VENDOR_ATTR_SET_RESET_PACKET_FILTER: Filter ID
  * @QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_VERSION: Filter Version
  * @QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_SIZE: Total Length
  * @QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_CURRENT_OFFSET: Current offset
- * @QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_PROGRAM: length of BPF instructions
+ * @QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_PROGRAM: length of APF instructions
  */
 enum qca_wlan_vendor_attr_packet_filter {
 	QCA_WLAN_VENDOR_ATTR_PACKET_FILTER_INVALID = 0,