[FS#621] Update QCA988X firmware

[LEDE Bugs]

The following task has a new comment added:

FS#621 - Update QCA988X firmware
User who did this - ckdalsdk12 (ckdalsdk12)

----------
Today, new 10.2.4-1.0 branch firmware is uploaded to kvalo's github.
https://github.com/kvalo/ath10k-firmware/blob/master/QCA988X/hw2.0/10.2.4-1.0/firmware-5.bin_10.2.4-1.0-00029
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=621#comment2272