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/configs/gplugd_defconfig b/configs/gplugd_defconfig
index b12dec2..fe2e00a 100644
--- a/configs/gplugd_defconfig
+++ b/configs/gplugd_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_DCACHE_OFF=y
 CONFIG_TARGET_GPLUGD=y
 CONFIG_SYS_TEXT_BASE=0x00f00000
 CONFIG_NR_DRAM_BANKS=2