ARC: Cache: Move I$ entire operation to a separate function

Move instruction cache entire operation to a separate function
because we are planing to use it in other places like
sync_icache_dcache_all().

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
1 file changed