ti-sysfw: Add HS firmware for AM62x SOC

Add TIFS firmware for AM62x HS variant. Initial version is based
on release v08.04.07.

MD5 checksum:
11b6c13edd533242345e2d3f88def9ba  ti-sysfw/ti-fs-firmware-am62x-hs-cert.bin
f2d8592e281ddf420878f11da83554b4  ti-sysfw/ti-fs-firmware-am62x-hs-enc.bin

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