Add v1.4.0 firmware for ath9k_htc.

This fixes a variety of issues, including but not limited to:

    ath9k_htc_firmware: check only the mesh control present subfield
    Fix: bug in extend_tsf near 0x8000000 values
    FIX: support rstamps from the future too.
    Firmware sometimes returns erroneous timestamps(2)
    Fixed incorrect wrapping handling in ath_extend_tsf().
    Firmware sometimes returns erroneous timestamps
    Added proper synchronization while handling lower 32 bit and
        upper 32 bit parts in ar5416GetTsf64().
    Fix resetting of txstatus flags.
    Fix Array Out of Bounds in rcSibUpdate_ht()
    ath9k_htc_firmware: fix the offset of CCMP header for mesh data frame
    init.c: do cold reboot on exception
    wmi:eadd new command WMI_REG_RMW_CMDID
    remove transfer type patches for EP3 and EP4
    k2_fw_usb_api: workaround for EP4 bug.
    k2_fw_usb_api: prevent buffer overflow.
    k2_fw_usb_api: fix typo in usb reg address
    k2_fw_usb_api: add delay after mac reset
    simplify STBC handling

This has been tested on both AR7010 and AR9271 devices.
Signed-off-by: Adrian Chadd <adrian@FreeBSD.org>
Signed-off-by: Kyle McMartin <kyle@kernel.org>

WHENCE

@@ -468,6 +468,10 @@ File: htc_9271.fw
 Version: 1.3.1
 File: htc_7010.fw
 Version: 1.3.1
+File: ath9k_htc/htc_7010-1.4.0.fw
+Version: 1.4.0
+File: ath9k_htc/htc_9271-1.4.0.fw
+Version: 1.4.0
 
 Licence: Redistributable. See LICENCE.atheros_firmware for details