pil-squasher: workaround for MSM8226 WCNSS firmware

[lumag]

On some of old devices WCNSS firmware has wrong p_filesz for the hash segment. Work around it by copying full hash segment if available.

[z3ntu]

Still doesn't work unfortunately...

[   62.891350] remoteproc remoteproc2: powering up fb204000.remoteproc
[   63.528583] remoteproc remoteproc2: Booting fw image qcom/msm8926/memul/wcnss.mbn, size 3946700
[   63.570652] qcom-wcnss-pil fb204000.remoteproc: error -5 initializing firmware qcom/msm8926/memul/wcnss.mbn
[   63.570748] remoteproc remoteproc2: Failed to load program segments: -5
[   63.571494] remoteproc remoteproc2: Boot failed: -5

(for reference here on github, the firmware this applies to is for HTC One Mini 2 https://github.com/fairblobs/memul-firmware)

Seems HTC has some custom secure boot on at least this device, the string "HTC Secure Boot" can be found in the binaries for example.