Kconfig: Remove all default n options

default n doesn't need to be specified. It is default option anyway.
Similar changes have been done by commit 18370f14975c ("Kconfig: Remove all
default n/no options").

Signed-off-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/boot/Kconfig b/boot/Kconfig
index d9a6c27..6f3096c 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -755,7 +755,6 @@
 
 	config MEASURE_IGNORE_LOG
 	bool "Ignore the existing event log"
-	default n
 	help
 	  On platforms that use an event log memory region that persists
 	  through system resets and are the first stage bootloader, then
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 408cc84..42757e0 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -492,7 +492,6 @@
 
 config CMD_ELF_FDT_SETUP
 	bool "Flattened Device Tree setup in bootelf cmd"
-	default n
 	depends on CMD_ELF
 	select LIB_LIBFDT
 	select LMB
@@ -2623,7 +2622,6 @@
 config CMD_SCMI
 	bool "Enable scmi command"
 	depends on SCMI_FIRMWARE
-	default n
 	help
 	  This command provides user interfaces to several SCMI (System
 	  Control and Management Interface) protocols available on Arm