Merge patch series "cmd: avoid duplicate weak functions"

Merge patch series "cmd: avoid duplicate weak functions"

Heinrich Schuchardt <heinrich.schuchardt@canonical.com> says:

[trini: Patch 1/3 was replaced by my series merged just prior to this,
 Heinrich's cover letter is lightly edited and any mistakes are my own]

If we have multiple weak implementations of functions, the linker might
choose any of these.

The EFI sub-systems uses invalidate_icache_all() after loading binaries.
Both the EFI sub-system and cmd/cache.c provide a weak
invalidate_icache_all() function. Remove the EFI instance.

For ARM11 functional implementation of invalidate_icache_all is missing.
Add it.