ARC: mm: fix new code about cache aliasing

Manual/partial revert of 8690bbc ("Introduce cpu_dcache_is_aliasing() across all architectures")

Current generation of ARCv2/ARCv3 based HSxx cores are only PIPT (to software
at least).

Legacy ARC700 cpus could be VIPT aliasing (based on cache geometry and
PAGE_SIZE) [1] however recently that support was ripped out so VIPT aliasing
cache is not relevant to ARC anymore.

[1] http://lists.infradead.org/pipermail/linux-snps-arc/2023-February/006899.html

Acked-by: Mathieu Desnoyers <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

Author: vineetgarc

arch/arc/Kconfig

@@ -6,7 +6,6 @@
 config ARC
 	def_bool y
 	select ARC_TIMERS
-	select ARCH_HAS_CPU_CACHE_ALIASING
 	select ARCH_HAS_CACHE_LINE_SIZE
 	select ARCH_HAS_DEBUG_VM_PGTABLE
 	select ARCH_HAS_DMA_PREP_COHERENT