riscv: Kconfig.errata: Drop dependency for MMU in ERRATA_ANDES_CMO config

Now that RISCV_DMA_NONCOHERENT conditionally selects DMA_DIRECT_REMAP
ie only if MMU is enabled, we no longer need the MMU dependency in
ERRATA_ANDES_CMO config.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230901105858.311745-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/Kconfig.errata

@@ -12,7 +12,7 @@ config ERRATA_ANDES
 
 config ERRATA_ANDES_CMO
 	bool "Apply Andes cache management errata"
-	depends on ERRATA_ANDES && MMU && ARCH_R9A07G043
+	depends on ERRATA_ANDES && ARCH_R9A07G043
 	select RISCV_DMA_NONCOHERENT
 	default y
 	help