spl: Ensure all SPL symbols in Kconfig have some SPL dependency

Tighten up symbol dependencies in a number of places.  Ensure that a SPL
specific option has at least a direct dependency on SPL.  In places
where it's clear that we depend on something more specific, use that
dependency instead.  This means in a very small number of places we can
drop redundant dependencies.

Reported-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig
index 418ed21..ccdd7d7 100644
--- a/drivers/led/Kconfig
+++ b/drivers/led/Kconfig
@@ -67,7 +67,7 @@
 
 config SPL_LED
 	bool "Enable LED support in SPL"
-	depends on SPL && SPL_DM
+	depends on SPL_DM
 	help
 	  The LED subsystem adds a small amount of overhead to the image.
 	  If this is acceptable and you have a need to use LEDs in SPL,
@@ -85,7 +85,7 @@
 
 config SPL_LED_GPIO
 	bool "LED support for GPIO-connected LEDs in SPL"
-        depends on SPL_LED && DM_GPIO
+        depends on SPL_LED && SPL_DM_GPIO
 	help
 	  This option is an SPL-variant of the LED_GPIO option.
 	  See the help of LED_GPIO for details.