am65xx-evm: add tispl.bin to wic image and comment for tiboot3.bin and sysfw.itb
am65xx-evm: add tispl.bin to wic image and comment for tiboot3.bin and sysfw.itb

Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>

rcn-ee/meta-ti,rcn-ee/meta-ti,rcn-ee/meta-ti,rcn-ee/meta-ti