arm: K3: sysfw-loader: Do not require full printf() for version info

arm: K3: sysfw-loader: Do not require full printf() for version info

A previous commit...

commit 1e8f92ad176e ("configs: Make USE_TINY_PRINTF depend on SPL||TPL and be default")

...causes the System Firmware version string during SPL boot to no longer
getting printed to the console as expected. To fix this issue rework the
handling of that string to only use basic printf() syntax rather than
for example disabling CONFIG_USE_TINY_PRINTF on affected devices, this
way maintaining most of the memory size benefit the initial patch brings
when it comes to SPL.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>