tpl: Ensure all TPL symbols in Kconfig have some TPL dependency

Tighten up symbol dependencies in a number of places.  Ensure that a TPL
specific option has at least a direct dependency on TPL.  In places
where it's clear that we depend on something more specific, use that
dependency instead.

Reported-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index 9b9a714..d3fe1d4 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -224,7 +224,7 @@
 
 config TPL_SYSCON
 	bool "Support system controllers in TPL"
-	depends on SPL_REGMAP
+	depends on TPL_REGMAP
 	help
 	  Many SoCs have a number of system controllers which are dealt with
 	  as a group by a single driver. Some common functionality is provided