linux-postmarketos-qcom-sm7150: upgrade to 6.7.4

Package changes:

• Kernel update to 6.7.4
• Add myself as Co-Maintainer

Kernel changes:

• Upstreamed to 6.7.4
• Partial audio support for xiaomi-surya and xiaomi-davinci
• Video mode panel fixes, enables xiaomi-surya and xiaomi-sweet panels
• nt36xxx touchscreen driver rewrite for xiaomi-surya

Tested on:

• xiaomi-surya (@JIaxyga)
• xiaomi-davinci (@Adrianyyy)