soong: Add firmware_8475 to allowlist PrebuiltFirmwareFactory

The Asus's Zenfone9 have an custom path for the Goodix FW (goodixfp64).
It fail to load even with symlink on the allow etc/firmware or fixup for libgf_ca.so

Change-Id: Iac7af9bdc8c4064bf7725ae9ba96c5d98180730a
Signed-off-by: micky387 <mickaelsaibi@free.fr>
diff --git a/fsgen/prebuilt_etc_modules_gen.go b/fsgen/prebuilt_etc_modules_gen.go
index c98e225..014c662 100644
--- a/fsgen/prebuilt_etc_modules_gen.go
+++ b/fsgen/prebuilt_etc_modules_gen.go
@@ -197,6 +197,7 @@
 		"etc":                 etc.PrebuiltEtcFactory,
 		"etc/dsp":             etc.PrebuiltDSPFactory,
 		"etc/firmware":        etc.PrebuiltFirmwareFactory,
+		"etc/firmware_8475":        etc.PrebuiltFirmwareFactory,
 		"firmware":            etc.PrebuiltFirmwareFactory,
 		"first_stage_ramdisk": etc.PrebuiltFirstStageRamdiskFactory,
 		"fonts":               etc.PrebuiltFontFactory,