ti-sysfw: Update System Firmwares to v08.04.06 for am64x and am62x

Update System Firmwares to version v08.04.06 for am64x and am62x

Major updates:
- Security Audit fixes for AM64x HS firmware
- DebugSS firewalls opened for GP/HS-FS device types
- Introduce firmware for HS-FS device type for silicon revision 2.0

MD5 Checksum:
ca8bd8fedfe3f6de21fc9cebe0e64dd1  ti-sysfw/ti-fs-firmware-am62x-gp.bin
7b0dda68b78c55fa55ea4c86989dba6a  ti-sysfw/ti-fs-stub-firmware-am62x-gp-signed.bin
5f552adad9866b9268939aeb809bbb61  ti-sysfw/ti-sci-firmware-am64x-gp.bin
75a46ad4b2adc87e78b3600f645a8835  ti-sysfw/ti-sci-firmware-am64x-hs-cert.bin
63c996db43d4ff06158f181442d19bc3  ti-sysfw/ti-sci-firmware-am64x-hs-enc.bin
6791f5b1f2393f0eb3eab47ebdabfa5a  ti-sysfw/ti-sci-firmware-am64x_sr2-hs-cert.bin
7277004d34f1e7d2c7f05fb2ecd27d74  ti-sysfw/ti-sci-firmware-am64x_sr2-hs-enc.bin
fce79704cc4917b667e1a5bd7a6b71f2  ti-sysfw/ti-sci-firmware-am64x_sr2-hs-fs-cert.bin
62025dbdcf37351780f2b88e260a8a9a  ti-sysfw/ti-sci-firmware-am64x_sr2-hs-fs-enc.bin

Signed-off-by: Vishal Mahaveer <vishalm@ti.com>