CONFIG_SYS_[DI]CACHE_OFF: convert to Kconfig

CONFIG_SYS_[DI]CACHE_OFF had been partially converted to Kconfig
parameters; only for the ARC architecture. This patch turns these two
parameters into Kconfig items everywhere else they are found.

All of the include/configs/* and defconfig changes in this patch are
for arm machines only. The Kconfig changes for arc, nds32, riscv,
and xtensa have been included since these symbols are found in code
under arch/{arc,nds32,riscv,xtensa}, however, no currently-defined
include/configs/* or defconfigs for these architectures exist which
include these symbols.

These results have been confirmed with tools/moveconfig.py.

Acked-by: Alexey Brodkin <abrodkin@snopsys.com>
Signed-off-by: Trevor Woerner <trevor@toganlabs.com>
[trini: Re-migrate for a few more boards]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 50369d5..240d3bb 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -109,12 +109,16 @@
 	  Build kernel for Big Endian Mode of ARC CPU
 
 config SYS_ICACHE_OFF
-	bool "Do not use Instruction Cache"
+	bool "Do not enable icache"
 	default n
+	help
+	  Do not enable instruction cache in U-Boot.
 
 config SYS_DCACHE_OFF
-	bool "Do not use Data Cache"
+	bool "Do not enable dcache"
 	default n
+	help
+	  Do not enable data cache in U-Boot.
 
 menuconfig ARC_DBG
 	bool "ARC debugging"