Kconfig: Remove redundant variable sets

In a few places we have Kconfig entries that set SPL_LDSCRIPT to what is
the default value anyways.  Drop these.

Cc: Michal Simek <monstr@monstr.eu>
Cc: Rick Chen <rick@andestech.com>
Cc: Philippe Reynes <tremyfr@yahoo.fr>
Cc: Eric Jarrige <eric.jarrige@armadeus.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com> (for Microblaze)
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 5ce8261..2bd260e 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -30,7 +30,4 @@
 
 source "board/xilinx/microblaze-generic/Kconfig"
 
-config SPL_LDSCRIPT
-	default "arch/microblaze/cpu/u-boot-spl.lds"
-
 endmenu
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 3338b78..f49618d 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -229,7 +229,4 @@
 	int
 	default 14
 
-config SPL_LDSCRIPT
-	default "arch/riscv/cpu/u-boot-spl.lds"
-
 endmenu
diff --git a/board/armadeus/apf27/Kconfig b/board/armadeus/apf27/Kconfig
index a342d2e..65544a8 100644
--- a/board/armadeus/apf27/Kconfig
+++ b/board/armadeus/apf27/Kconfig
@@ -1,8 +1,5 @@
 if TARGET_APF27
 
-config SPL_LDSCRIPT
-	default "arch/$(ARCH)/cpu/u-boot-spl.lds"
-
 config SYS_BOARD
 	default "apf27"